Webster's Revised Unabridged Dictionary · 1913

Rafter

Rafter (rȧft"ẽr) , noun

A raftsman.

Rafter , noun

[Anglo-Saxon rafter; akin to English raft, n. See Raft.]

(Architecture) Originally, any rough and somewhat heavy piece of timber. Now, commonly, one of the timbers of a roof which are put on sloping, according to the inclination of the roof. See Illust. of Queen-post.
[Courtesy] oft is sooner found in lowly sheds, With smoky rafters, than in tapestry halls. — Milton

Rafter , transitive verb

1.
To make into rafters, as timber.
2.
To furnish with rafters, as a house.
3.
(Agriculture) To plow so as to turn the grass side of each furrow upon an unplowed ridge; to ridge. [English]