EXAMPLES FROM THE WEB FOR TAP
The boiler leaked at nearly every hole where a tap had been screwed into it.
I got him to tap it gentler and gentler, and could hear the most feeble tap.
But either Epimetheus had not heard the tap, or was too much out of humor to notice it.
Wahb could have hurled him across the Graybull with one tap now.
But he had not sat reading very long, when he heard a tap at his door.
At last, however, he felt a tap on the shoulder: "Monsieur l'Abbe!"
That evening there was a tap at the state-room door of Miss Jennie Brewster.
When they hear that tale at the tap of the Wheatsheaf, there will be some throats dry with laughter.
Madden was just marking these men when there was a tap at the door.
He started at a tap on the door, and the past came back in a rush.
"strike lightly," c.1200, from Old French taper "tap, rap, strike," from a Gallo-Romance or Germanic source ultimately imitative of the sound of rapping. Meaning "to designate for some duty or for membership" is recorded from 1952, from notion of a tap on the shoulder. Related: Tapped; tapping.