- (US, Canada) Of or pertaining to something at a diagonal to another; of four corners, those diagonal to another.
- The Empire State Building and the old Altman's Department store are catercorner, at Fifth Avenue and East 34th Street, with the ESB at the southwest, and Altman's at the northeast.
- (US, Canada) Diagonally across from.
- Altman's is sited catercorner to the ESB.
cater- + corner, where cater- is of disputed origin. Liberman argues that this is a prefix meaning “crooked, angled, clumsy”, of North Germanic origin; compare cater-cousin. The verb cater (“move diagonally, place diagonally, cut diagonally”) is attested from 1577 (Liberman proposes this as a backformation from cater-), and in 19th century Lancashire dialect, cater-cornered refers both to stone blocks that are out of square, and people who walk twisted (with one side in front of the other), especially if partially paralyzed. Further awkward and clumsy are of Scandinavian origin, and Old Irish cittach (“left-handed, awkward”) is cognate to cater- words, also suggesting a Scandinavian origin.
A commonly proposed etymology (proposed in the 19th century) derives cater, from French quatre (“four”) (hence “four corner” – at the opposite corner of a square), and similarly cater-cousin from “fourth cousin”, while Liberman rejects this as implausible – similar terms from French are simply calqued as “four corners” (as in “four corners of the world”, from French “les quatre coins du monde”), the English term cater (“four”) (from French) was primarily used in dice, the domestication of a specialized foreign term as an adverb for “across” seems implausible, there are many Germanic terms that appear to be cognates, and other terms with cater- are found in English dialects.