a mark or stroke long in proportion to its breadth, made with a pen, pencil, tool, etc., on a surface

a line down the middle of the page.

Mathematics . a continuous extent of length, straight or curved, without breadth or thickness; the trace of a moving point.

something arranged along a line, esp. a straight line; a row or series

a line of trees.

a number of persons standing one behind the other and waiting their turns at or for something; queue.

something resembling a traced line, as a band of color, a seam, or a furrow

lines of stratification in rock.

a furrow or wrinkle on the face, neck, etc.

lines around the eyes.

an indication of demarcation; boundary; limit

the county line; a fine line between right and wrong.

a row of written or printed letters, words, etc.

a page of 30 lines.

a verse of poetry

A line in iambic pentameter contains five feet.

Usually, lines. the words of an actor's part in a drama, musical comedy, etc.

to rehearse one's lines.

a short written message

Drop me a line when you're on vacation.

a system of public conveyances, as buses or trains, plying regularly over a fixed route

the northbound line at State Street.

a transportation or conveyance company

a steamship line.

a course of direction; route

the line of march down Main Street.

a course of action, procedure, thought, policy, etc.

That newspaper follows the communist line.

a piece of pertinent or useful information (usually fol. by on )

I've got a line on a good used car.

a series of generations of persons, animals, or plants descended from a common ancestor

a line of kings.

a department of activity; occupation or business

What line are you in?

Informal . a mode of conversation, esp. one that is glib or exaggerated in order to impress or influence another person

He really handed her a line about his rich relatives.

a straight line drawn from an observed object to the fovea of the eye.

lines,

the outer form or proportions of a ship, building, etc.

a ship of fine lines.

a general form, as of an event or something that is made, which may be the basis of comparison, imitation, etc.

two books written along the same lines.

a person's lot or portion

to endure the hard lines of poverty.

Chiefly British . a certificate of marriage.

a circle of the terrestrial or celestial sphere

the equinoctial line.

banner ( def. 7 ) .

Fine Arts .

a mark made by a pencil, brush, or the like, that defines the contour of a shape, forms hatching, etc.

the edge of a shape.

Television . one scanning line.

Telecommunications .

a telephone connection

Please hold the line.

a wire circuit connecting two or more pieces of electric apparatus, esp. the wire or wires connecting points or stations in a telegraph or telephone system, or the system itself.

the line, Geography . the equator.

a stock of commercial goods of the same general class but having a range of styles, sizes, prices, or quality

the company's line of shoes.

an assembly line.

Law . a limit defining one estate from another; the outline or boundary of a piece of real estate.

Bridge . a line on a score sheet that separates points scored toward game (below the line) from points scored by setting a contract, having honors, etc. (above the line).

Music . any of the straight, horizontal, parallel strokes of the staff, or one placed above or below the staff.

Military .

a defensive position or front.

a series of fortifications

the Maginot line.

Usually, lines. a distribution of troops, sentries, etc., for the defense of a position or for an attack

behind the enemy's lines.

the body of personnel constituting the combatant forces of an army, as distinguished from the supply services and staff corps.

an arrangement of troops of an army or of ships of a fleet as drawn up for battle

line of battle.

a body or formation of troops or ships drawn up abreast ( distinguished from column ).

the class of officers serving with combatant units or warships.

the regular forces of an army or navy.

that part of an administrative organization consisting of persons actively engaged on a given project. Compare staff 1 ( def. 4 ) .

a thread, string, cord, rope, or the like.

a clothesline

the wash hanging on the line.

a cord, wire, or the like, used for measuring or as a guide.

Nautical .

a pipe or hose

a steam line.

a rope or cable used at sea.

Slang . a small quantity of cocaine arranged in the form of a slender thread or line, as for sniffing.

Also, ligne. a unit, 1 / 40 inch (0.635 millimeter), for measuring the diameter of buttons.

Angling . a length of nylon, silk, linen, cord, or the like, to which are attached the leader, hook, sinker, float, etc.

Football .

either of the two front rows of opposing players lined up opposite each other on the line of scrimmage

a four-man line.

line of scrimmage.

the betting odds established by bookmakers for events not covered by pari-mutuel betting, esp. sporting events, as football or basketball.

Ice Hockey . the two wings and center who make up a team's offensive unit.

Fencing . any of the four divisions of the portion of a fencer's body on which a touch can be scored, taken as an area of attack or defense.

Textiles . the longer and preferred flax or hemp fibers. Compare tow 2 ( def. 2 ) .

Fox Hunting . the trail of scent left by a fox.

a unit of length equivalent to 1 / 12 inch (2.12 millimeters).

Insurance .

a class or type of insurance

casualty line.

the amount of insurance written for a particular risk.

Australian Slang . a girl or woman.

to take a position in a line; range (often fol. by up )

to line up before the start of a parade.

Baseball .

to hit a line drive.

to line out.

to bring into a line, or into line with others (often fol. by up )

to line up troops.

to mark with a line or lines

to line paper for writing.

to sketch verbally or in writing; outline (often fol. by out )

We followed the plan he had lined out.

to arrange a line along

to line a coast with colonies.

to form a line along

Rocks lined the drive.

to apply liner to (the eyes).

to delineate with or as if with lines; draw

to line the silhouette of a person's head.

Archaic . to measure or test with a line. ?

line out,

Baseball . to be put out by hitting a line drive caught on the fly by a player of the opposing team.

to execute or perform

He lined out a few songs upon request.

line up, to secure; make available

to line up support; to line up a speaker for the banquet.

bring, come, or get into line

to become or cause to become straight, as in a row

The members of the marching band got into line.

to conform or cause to conform or agree

They were persuaded to come into line with the party's policy.

down the line

in all ways; thoroughly; fully

It's a fine house right down the linewell-built, roomy, attractive.

in the future.

draw the line

to impose a restriction; limit

They might exaggerate but would draw the line at outright lying.

go up in one's lines, Theater . to forget one's part during a performance. Also, British

go up on one's lines.

hold the line, to maintain the status quo

esp. in order to forestall unfavorable developments

We're trying to hold the line on prices.

in line

in alignment; straight.

in conformity or agreement.

in control (of one's conduct)

to keep one's temper in line.

prepared; ready.

waiting one behind the other in a queue

There were eight people in line at the teller's window.

in line with

in agreement or conformity with

The action taken was in line with her decision.

in the line of duty, in the execution of the duties belonging to some occupation

esp. with regard to the responsibility for life and death

a policeman wounded in the line of duty. Also, in line of duty.

lay it on the line

Informal .

to give money; pay.

to give the required information; speak directly or frankly

I'm going to stop being polite and lay it on the line.

off line

occurring or functioning away from an assembly line, work process, etc.

not in operation; not functioning.

on a line

Baseball . (of a batted or thrown ball) through the air in an approximately straight line from the point of impact or delivery

hit on a line between third and short; thrown in on a line from the center fielder.

on line

on or part of an assembly line

Production will be improved when the new welding equipment is on line.

in or into operation

The manufacturing facilities will be on line before November.

Computers . actively linked to a computer

The printer is not yet on line.

Chiefly New York City . line 1 ( def. 72e ) .

on the line

Informal .

being risked or put in jeopardy; in a vulnerable position

Our prestige and honor are on the line.

immediately; readily

paid cash on the line.

out of line

not in a straight line.

in disagreement with what is accepted or practiced.

Informal . impertinent; presumptuous

That last remark was out of line.

read between the lines

to understand the unexpressed but implied meaning of something said or written

Her letter sounded cheerful enough, but I read a certain sadness between the lines.

toe the line or mark

to conform strictly to a rule, command, etc.

to shoulder responsibilities; do one's duty

He tried hard to toe the line on the new job.