1 (also butt end) the thicker end, especially of a tool or a weapon:a rifle butt
the square end of a plank or plate meeting the end or side of another, as in the side of a ship.
the thicker or hinder end of a hide used for leather.
2 (also butt end) the stub of a cigar or a cigarette:the ashtray was crammed with cigarette butts
3 informal the buttocks or anus.
4the trunk of a tree, especially the part just above the ground.
verb
[no object]
adjoin or meet end to end:the church butted up against the row of housesa garden that butted up to the neighbor’s
[with object] join (pieces of stone, lumber, and other building materials) with the ends or sides flat against each other:the floorboards will be butted up against each other to make tight seams
Origin:
late Middle English: the noun apparently related to Dutch bot 'stumpy', also to buttock; the verb partly from butt2, reinforced by abut
