strike against forcefully
(of quantities) imprecise but fairly close to correct
all around or on all sides
deliver a sharp blow or push :"He knocked the glass clear across the room"
rap with the knuckles
in the area or vicinity
knock against with force or violence
in or to a reversed position or direction
used of movement to or among many different places or in no particular direction
the sound of knocking (as on a door or in an engine or bearing)
