[kreep] 
verb, crept, creep⋅ing, noun | 1. | to move slowly with the body close to the ground, as a reptile or an insect, or a person on hands and knees. |
| 2. | to approach slowly, imperceptibly, or stealthily (often fol. by up): We crept up and peeked over the wall. |
| 3. | to move or advance slowly or gradually: The automobile crept up the hill. Time just seems to creep along on these hot summer days. |
| 4. | 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. |
| 5. | 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. |
| 6. | to move or behave timidly or servilely. |
| 7. | to grow along the ground, a wall, etc., as a plant. |
| 8. | to advance or develop gradually so as to infringe on or supplant something else: creeping inflation; creeping socialism. |
| 9. | to slip, slide, or shift gradually; become displaced. |
| 10. | (of a metal object) to become deformed, as under continuous loads or at high temperatures. |
| 11. | Nautical. to grapple (usually fol. by for): The ships crept for their anchor chains. |
| 12. | Archaic. to creep along or over. |
| 13. | an act or instance of creeping. |
| 14. | Slang. a boring, disturbingly eccentric, painfully introverted, or obnoxious person. |
| 15. | Slang. an intelligence or counterintelligence agent; spy. |
| 16. | Geology.
|
| 17. | Mechanics. the gradual, permanent deformation of a body produced by a continued application of heat or stress. |
| 18. | a grappling iron; grapnel. |
| 19. | Firearms. the slack in a trigger mechanism before it releases the firing pin. |
| 20. | creep feeder. |
| 21. | 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. |
| 22. | make one's flesh creep, to be frightening or repellent; cause one to experience uneasiness: The eerie stories made our flesh creep. |
creep up on
Advance slowly or stealthily, as in The cat crept up on the bird, or Autumn is creeping up on us. This expression is recorded in slightly different form
creep in or creep onfrom the 15th century on. One of the Hymns to the Virgin and Christ (c. 1430) has "Now age has cropen [crept] up on me ful stille."