at or toward the rear of

Look behind the house.

not keeping up with, later than; after

behind schedule.

in the state of making less progress than

We can't afford to fall behind our competitors.

on the farther side of; beyond

behind the mountain.

originating, supporting, or promoting

Who's behind this program?

hidden or unrevealed by

Malice lay behind her smile.

at the controls of

behind the wheel of a car.

at or toward the rear; rearward

to lag behind.

in a place, state, or stage already passed.

in arrears; behindhand

to be behind in one's rent.

slow, as a watch or clock

more than 20 minutes behind.

as a cause or often latent feature of

Behind their harassment lay the traditional fear of foreigners.

in a situation that exists afterward

The victim left behind a large family.

Archaic . in reserve; to come

Greater support is yet behind.

following

the man behind.

Informal . the buttocks.

adverb

front , paid

noun

front

adverb

abaft , after , afterwards , at the heels of , at the rear of , back of , bringing up the rear , eating the dust , in the background , in the wake , later than , next , off the pace , subsequently , trailing , backward , behindhand , behind schedule , behind time , belated , delayed , dilatory , have to play catch up , in arrears , laggard , overdue , slow , sluggish , tardy , belatedly , tardily , late

noun

backside , bottom , breech , can * , derrire , fanny * , fundament , posterior , rear , rump , seat , tail , tush , buttock , derriere , gluteus , podex

preposition

at the bottom of , causing , concerning the circumstances , initiating , instigating , responsible for , backing , for , in agreement , on the side of , supporting , abaft , aft , after , afterwards , arear , arrear , astern , backward , buttocks , derriere , fanny , laggard , late , losing , past , posterior , rear , rump , seat , tardy , trailing , tush , ward