oblique

Definitions:

Deviating from a right line; not parallel; aslant; not direct; by a side glance; not an angle of 90 degrees; sinister; applied to any case of a noun not the nominative.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Placed obliquely ; certain muscles ; asymmetrical.
- A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920. (adjective) (adj.) (adjective)
Slanting: not perpendicular: not parallel: not straightforward: obscure: ( geom.) not a right angle: ( gram.) denoting any case except the nominative.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
Obliquely.
- Newage Dictionary DB (adverb) (adv.) (adverb)
Not horizontal nor perpendicular; not upright nor level; slanting; not direct or straight forward.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Obiquity.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)
Slanting; not perpendicular, not parallel; indirect.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Slanting; neither perpendicular nor parallel; indirect; sinister.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Obliqueness.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
To move forward to the right or left, by stepping sideways. An oblique angle, an angle greater or less than a right angle. An oblique plane, a plane that declines from the zenith. An oblique projection, where a body is projected in a line, making an oblique angle with the horizontal line. An oblique sphere, that in which the axis of the earth is inclined to the horizon of the place. An oblique case, any case except the nominative.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (verb, noun) (v. & n.) (verb, noun)

Usage examples:

He opened the door for Mrs. Brigstock, who passed before the girl with an oblique averted salutation.
- The Spoils of Poynton by Henry James
The ball- game square, while he walks quickly above it, is still lighted by the sun with a finishing ray, oblique toward the background, toward the wall which the ancient inscription surmounts,- as on the evening of his first great success, four years ago, when, in the joyous crowd, Gracieuse stood in a blue gown, she who has become a black nun to- day.
- Ramuntcho by Pierre Loti
I raise my head; right- oblique is a battery; ...
- Who Goes There? by Blackwood Ketcham Benson