Definition of "three"

Venters began to count them—one—two—three—four—on up to sixteen.

1912 January, Zane Grey, chapter 8, in Riders of the Purple Sage […], New York, N.Y., London: Harper & Brothers Publishers

Okay, on three, we open the door and jump on the rope. One, two…Wait, wait! Do we go on three? Or do we go on “go”?Three! Who said anything about “go”?

2003 April 7, Michelle Lamoreaux, Robert Lamoreaux, “A Spy is Born Part II”, in Totally Spies!, season 2, episode 1, spoken by Clover (Jennifer Hale as Samantha “Sam” and Andrea Taylor), Marathon Media, via Teletoon

Why should she care? One…two…Do we shoot on three?Yes on three. Like one, two, three, shoot.

2011 October 18, Paul Dini, Paul Crocker, Sefton Hill, Batman: Arkham City, spoken by Joker thugs, Warner Bros. Interactive Entertainment, via Rocksteady Studios

It was a weary time. A carriage clock had been placed on the discoloured wooden mantelpiece, and slowly its hands crept on from one to two and from two to three.

1925 July – 1926 May, A[rthur] Conan Doyle, “In which Three Investigators Come across a Dark Soul”, in The Land of Mist (eBook no. 0601351h.html), Australia: Project Gutenberg Australia, published April 2019