I. verb
1.
to meet with or come up against forcibly
the two cars bumped with a great crumpling of fenders
Synonyms: clash, collide, ||prang
Related Word: bang, carom, crash, hit, knock, slam, strike; impinge; jar, jolt
Idioms: whang together
2.
Synonyms: happen 2, chance, hit, light, luck, meet, stumble, tumble
3.
Synonyms: degrade 1, break, bust, declass, demerit, demote, disgrade, disrate, downgrade, reduce
II. noun
1.
Synonyms: impact 1, clash, collision, concussion, crash, jar, jolt, percussion, shock, wallop
2.
a swelling of tissue usually resulting from a blow
fell and got a bump on his head
Synonyms: bunch, knot, lump, ||pumpknot
Related Word: protuberance, swelling
3.
a marked unevenness in a road surface likely to jolt a passing vehicle
Synonyms: ||cahot, thank-you-ma'am
Related Word: chuckhole, mudhole, pothole, rut
4.
Synonyms: gift 2, aptness, bent, faculty, flair, genius, head, knack, talent, turn