to move slowly with the body close to the ground, as a reptile or an insect, or a person on hands and knees.

to approach slowly, imperceptibly, or stealthily (often fol. by up )

We crept up and peeked over the wall.

to move or advance slowly or gradually

The automobile crept up the hill. Time just seems to creep along on these hot summer days.

to sneak up behind someone or without someone's knowledge (usually fol. by up on )

The prisoners crept up on the guard and knocked him out.

to enter or become evident inconspicuously, gradually, or insidiously (often fol. by in or into

The writer's personal bias occasionally creeps into the account.

to move or behave timidly or servilely.

to grow along the ground, a wall, etc., as a plant.

to advance or develop gradually so as to infringe on or supplant something else

creeping inflation; creeping socialism.

to slip, slide, or shift gradually; become displaced.

(of a metal object) to become deformed, as under continuous loads or at high temperatures.

Nautical . to grapple (usually fol. by for )

The ships crept for their anchor chains.

Archaic . to creep along or over.

an act or instance of creeping.

Slang . a boring, disturbingly eccentric, painfully introverted, or obnoxious person.

Slang . an intelligence or counterintelligence agent; spy.

Geology .

the gradual movement downhill of loose soil, rock, gravel, etc.; solifluction.

the slow deformation of solid rock resulting from constant stress applied over long periods.

Mechanics . the gradual, permanent deformation of a body produced by a continued application of heat or stress.

a grappling iron; grapnel.

Firearms . the slack in a trigger mechanism before it releases the firing pin.

creep feeder.

the creeps, Informal . a sensation of horror, fear, disgust, etc., suggestive of the feeling induced by something crawling over the skin

That horror movie gave me the creeps.

make one's flesh creep

to be frightening or repellent; cause one to experience uneasiness

The eerie stories made our flesh creep.

adjective

upright , standing , vertical

adjective

crawling , worming , squirming , writhing , wriggling , slithering , groveling , quailing , slinking , skulking , inching , dragging , shambling , shuffling , hobbling , sneaking , moving slowly , barely moving , on all fours , reptant , reptilian , vermicular , serpentine , prostrate , clinging , spreading , trailing , procumbent , stoloniferous , growing along the ground , horizontal , recumbent , vinelike , climbing , fawning , obsequious , reptatorial , reptile , serpiginous , sycophantic , truckling