I
n.
thumping noise
1) engine knock
2) a gentle; loud knock
3) a knock at, on (a knock at/on the door)
blow
(colloq.)
4) hard knocks (she has taken some hard knocks in her life)
II
v.
1) ('to rap') to knock loudly
2) (colloq. ) (d; intr.) ('to wander') to knock about, around (he knocked around the western part of the state for a few months)
3) (d; intr., tr.) ('to strike') to knock against (she knocked her head against the ceiling)
4) (D; intr.) ('to rap') to knock at, on (to knock at/on the door)
5) (d; tr.) ('to pound') to knock into (to knock some sense into smb.'s head)
6) (d; tr.) to knock off ('to fell') (he knocked me off my feet)
7) (d; tr.) ('to remove') to knock out of (the impact knocked two teeth out of his mouth)
8) (N; used with an adjective) ('to render by striking') to knock smb. cold
9) (P; tr.) ('to render by striking') she knocked me down
10) (misc.) knock it off! (slang) ('stop!')