either of the two lower limbs of a biped, as a human being, or any of the paired limbs of an animal, arthropod, etc., that support and move the body.

Anatomy . the lower limb of a human being from the knee to the ankle.

something resembling or suggesting a leg in use, position, or appearance.

the part of a garment that covers the leg

the leg of a stocking; trouser leg.

one of usually several, relatively tall, slender supports for a piece of furniture.

one of the sides of a forked object, as of a compass or pair of dividers.

one of the sides of a triangle other than the base or hypotenuse.

a timber, bar, or the like, serving to prop or shore up a structure.

one of the flanges of an angle iron.

one of the distinct sections of any course

the last leg of a trip.

Nautical .

one of the series of straight runs that make up the zigzag course of a sailing ship.

one straight or nearly straight part of a multiple-sided course in a sailing race.

Sports .

one of a designated number of contests that must be successfully completed in order to determine the winner.

one of the stretches or sections of a relay race.

legs, (in wine tasting) the rivulets of wine that slowly descend along the inside of a glass after the wine has been swirled, sometimes regarded as an indication that the wine is full-bodied.

Cricket .

the part of the field to the left of and behind the batsman as he faces the bowler or to the right of and behind him if he is left-handed.

the fielder playing this part of the field.

the position of this fielder.

Electricity . a component or branch of a circuit, network, antenna, etc.

Radio and Television . a connecting link between stations in a network, as the microwave relays used in transmitting a show from one geographical area to another.

bride 2 ( def. 1 ) .

to move or propel (a boat) with the legs

They legged the boat through the tunnel.

leg up, to help (someone) to mount a horse. ?

leg it

Informal . to walk rapidly or run

We'd better leg it or we'll be late for class.

leg up

a means of help or encouragement; assist; boost

Studying the material with a tutor will give you a leg up on passing the exam.

advantage; edge.

not have a leg to stand on

to lack a valid or logical basis for one's argument or attitude

Without evidence, the prosecutor doesn't have a leg to stand on.

on one's or its last legs, just short of exhaustion, breakdown, failure

etc.

The aristocracy was on its last legs.

pull someone's leg

to make fun of someone; tease.

to deceive someone; trick someone.

shake a leg

Informal .

to hurry up.

Older Use . to dance.

stretch one's legs

to take a walk; get some needed exercise after prolonged sitting

He got up during the intermission to stretch his legs.