1. (noun)oblique, oblique case any grammatical case other than the nominative
2. (noun)external oblique muscle, musculus obliquus externus abdominis, abdominal external oblique muscle, oblique a diagonally arranged abdominalmuscle on either side of the torso
3. (adj)oblique slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled
"the oblique rays of the winter sun"; "acute and obtuse angles are oblique angles"; "the axis of an oblique cone is not perpendicular to its base"
4. (adj)devious, oblique indirect in departing from the accepted or proper way; misleading
"used devious means to achieve success"; "gave oblique answers to direct questions"; "oblique political maneuvers"