To make a sound by striking one's knuckles against something.
To knock, especially a door, in order to ask for someone to open it, and, thus, to be able to go inside.
To express negative criticism.
To deliver a sharp blow or push.
A vigorous blow.
The sound of knocking (as on a door or in an engine or bearing).
knock against with force or violence; "My car bumped into the tree"
a bad experience; "the school of hard knocks"
rap with the knuckles; "knock on the door"
a vigorous blow; "the sudden knock floored him"; "he took a bash right in his face"; "he got a bang on the head"
the act of hitting vigorously; "he gave the table a whack"
the sound of knocking (as on a door or in an engine or bearing)
negative criticism
deliver a sharp blow or push :"He knocked the glass clear across the room."
of car engines, when firing too early
make light, repeated taps on a surface
the sound of knocking (as on a door or in an engine or bearing); "the knocking grew louder"
find fault with; express criticism of; point out real or perceived flaws; "The paper criticized the new movie"; "Don''t knock the food--it''s free"
deliver a sharp blow or push :"He knocked the glass clear across the room"
sound like a car engine that is firing too early; "the car pinged when I put in low-octane gasoline"; "The car pinked when the ignition was too far retarded"
make light, repeated taps on a surface; "he was tapping his fingers on the table impatiently"
the act of hitting vigorously
a bad experience
a vigorous blow
find fault with; express criticism of; point out real or perceived flaws
