From The Collaborative International Dictionary of English v.0.48:
But \But\, v. i. [imp. & p. p. Butted; p. pr. & vb. n.
Butting.]
See Butt, v., and Abut, v.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Butt \Butt\, v. i. [imp. & p. p. Butted; p. pr. & vb. n.
Butting.] [OE. butten, OF. boter to push, F. bouter. See
Butt an end, and cf. Boutade.]
1. To join at the butt, end, or outward extremity; to
terminate; to be bounded; to abut. [Written also but.]
[1913 Webster]
And Barnsdale there doth butt on Don's well-watered
ground. --Drayton.
[1913 Webster]
2. To thrust the head forward; to strike by thrusting the
head forward, as an ox or a ram. [See Butt, n.]
[1913 Webster]
A snow-white steer before thine altar led,
Butts with his threatening brows. --Dryden.
[1913 Webster]