Definitions for: Knock

[n] the act of hitting vigorously; "he gave the table a whack"
[n] negative criticism
[n] a bad experience; "the school of hard knocks"
[n] the sound of knocking (as on a door or in an engine or bearing); "the knocking grew louder"
[n] a vigorous blow; "the sudden knock floored him"; "he took a bash right in his face"; "he got a bang on the head"
[v] deliver a sharp blow or push :"He knocked the glass clear across the room."
[v] knock against with force or violence; "My car bumped into the tree"
[v] rap with the knuckles; "knock on the door"
[v] of car engines, when firing too early
[v] make light, repeated taps on a surface; "he was tapping his fingers on the table impatiently"

Webster (1913) Definition: Knock, v. i. [imp. & p. p. Knocked; p. pr. & vb. n.
Knocking.] [OE. knoken, AS. cnocian, cnucian; prob. of
imitative origin; cf. Sw. knacka.Cf. Knack.]
1. To drive or be driven against something; to strike against
something; to clash; as, one heavy body knocks against
another. --Bacon.

2. To strike or beat with something hard or heavy; to rap;
as, to knock with a club; to knock on the door.

For harbor at a thousand doors they knocked.

Seek, and ye shall find; knock, and it shall be
opened unto you. --Matt. vii.

To knock about, to go about, taking knocks or rough usage;
to wander about; to saunter. [Colloq.] ``Knocking about
town.'' --W. Irving.

To knock up, to fail of strength; to become wearied or worn
out, as with labor; to give out. ``The horses were
beginning to knock up under the fatigue of such severe
service.'' --De Quincey.

To knock off, to cease, as from work; to desist.

To knock under, to yield; to submit; to acknowledge one's
self conquered; -- an expression probably borrowed from
the practice of knocking under the table with the
knuckles, when conquered. ``Colonel Esmond knocked under
to his fate.'' --Thackeray.

Knock (n[o^]k), v. t.
1. To strike with something hard or heavy; to move by
striking; to drive (a thing) against something; as, to
knock a ball with a bat; to knock the head against a post;
to knock a lamp off the table.

When heroes knock their knotty heads together.

2. To strike for admittance; to rap upon, as a door.

Master, knock the door hard. --Shak.

To knock down.
(a) To strike down; to fell; to prostrate by a blow or by
blows; as, to knock down an assailant.
(b) To assign to a bidder at an auction, by a blow or
knock; to knock off.

To knock in the head, or on the head, to stun or kill by
a blow upon the head; hence, to put am end to; to defeat,
as a scheme or project; to frustrate; to quash. [Colloq.]
-- To knock off.
(a) To force off by a blow or by beating.
(b) To assign to a bidder at an auction, by a blow on the
(c) To leave off (work, etc.). [Colloq.] -- {To knock
out}, to force out by a blow or by blows; as, to knock out
the brains.

To knock up.
(a) To arouse by knocking.
(b) To beat or tire out; to fatigue till unable to do
more; as, the men were entirely knocked up. [Colloq.]
``The day being exceedingly hot, the want of food had
knocked up my followers.'' --Petherick.
(c) (Bookbinding) To make even at the edges, or to shape
into book form, as printed sheets.

Knock, n.
1. A blow; a stroke with something hard or heavy; a jar.

2. A stroke, as on a door for admittance; a rap. `` A knock
at the door.'' --Longfellow.

A loud cry or some great knock. --Holland.

Knock off, a device in a knitting machine to remove loops
from the needles.

Knock, v. i.
To practice evil speaking or fault-finding; to criticize
habitually or captiously. [Vulgar Slang, U. S.]

Knock, v. t.
To impress strongly or forcibly; to astonish; to move to
admiration or applause. [Slang, Eng.]

Synonyms: bang, bash, belt, belt, bump, knocking, ping, pink, rap, rap, roast, smash, strike hard, tap, whack, whang

See Also: bad luck, batter, blow, blow, bowl over, buffet, bump, bump into, butt against, coldcock, collide with, criticism, critique, deck, dump, floor, go, hit, impinge on, jar against, kayo, knap, knock about, knock against, knock cold, knock down, knock out, knock over, misfortune, overturn, rap, run into, sound, sound, strike, tip over, turn over, upset

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