- tap
- tap vb Tap, knock, rap, thump, thud can mean, as verbs, to strike or hit audibly or, as nouns, the sound or effect produced by such striking or hitting.Tap implies a light blow usually repeated (as to attract attention to one's presence, needs, or wishes){
tap at her door
}{tapping on the window
}{she tapped her pencil on the desk for order
}Knock implies a more forcible blow than tap, often a pounding or hammering (as on a door to call attention to one's need for admittance or on a person's body or head in an attack or a collision){there came a heavy knock on the door
}{the messenger knocked loudly to awaken us
}In extended use knock may imply a sound or an effect that suggests a knocking{an automobile engine may knock because of uneven combustion
}Rap suggests a smart, vigorous striking (as with the knuckles) on a hard surface so as to produce a sharp, quick sound or succession of sounds{the chairman rapped sharply for order
}{a rap at the door
}In extended use rap implies utterance that comes as quick and as sharp as rapping{rap out a series of commands
}{the tired businessman . . . wants his poems snapped at him, rapped at him— Lowes
}Thump implies the dull, heavy, yet resonant sound made by something that pounds or beats (as the fist upon a table or heavy feet upon the ground) or by something that pulsates forcibly and noisily{hear the thump of many feet
}{the thumping of a big drum
}{the thump of a boat against the pier
}{everybody's heart was thumping as hard as possible— Thackeray
}Thud places more emphasis upon the sound made than upon the action which produces it and carries a less strong suggestion of repetition; also, it more often suggests the sound made by something falling and striking than by something being struck; otherwise it differs only by suggesting a flatter or hollower and less resonant sound than thump{the dull thud of a heavy body striking the floor
}{a bullet thudded into the wall above me— Hubert Wales
}tap n rap, knock, thump, thud (see under TAP vb)
New Dictionary of Synonyms. 2014.