Meaning

adjective having an oblique or slanted direction

adverb over or across in a slanting direction

adverb at an oblique angle

originThe adverb is derived from Middle English aslant, aslante (“at an angle, in a curve; from the side; (figurative) deviously”), from on slant (“at an angle, obliquely”), from on (“above and touching (something), on; at (a place or position); etc.”, preposition) (from Old English on, ultimately from Proto-Germanic *an (“on, upon; on to”), from Proto-Indo-European *h₂en- (“on, on to”)) + slant,…

Etymology from Wiktionary, CC BY-SA 3.0