Oblique

1. adjective

   slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled

   “the oblique rays of the winter sun”

2. noun

   a diagonally arranged abdominal muscle on either side of the torso

   Similar: external oblique muscle, musculus obliquus externus abdominis, abdominal external oblique muscle

3. adjective

   indirect in departing from the accepted or proper way; misleading

   “used devious means to achieve success”

   Similar: devious

4. noun

   any grammatical case other than the nominative

   Similar: oblique case