(now regional) The Eurasian blackbird, Turdus merula. / (chiefly Canada, US) The water ouzel, an aquatic perching bird, Cinclus mexicanus.

(analytic geometry) A system in which the coordinate axes are oblique to each other.

The hard pearly inner layer of certain mollusk shells; nacre. / A butterfly of the genus Salamis.

Made from or looking like mother-of-pearl; iridescent or pearly.

(idiomatic) Considering only intrinsic good points and bad points, without prejudice or other considerations, such as procedural ones.

(idiomatic) In broad agreement or sharing a common general understanding or knowledge (common in office environments). / Used other than figuratively or idiomatically: on the same page.

Alternative spelling of run-of-the-mill

(derogatory, idiomatic) An elderly person who holds old-fashioned views.

(dated) Used other than figuratively or idiomatically: see jerk, off. / (idiomatic, slang) To masturbate, usually a male. / (intransitive, vulgar) To do nothing; to waste time.

(vulgar, countable, slang, US) An annoying person. / (vulgar, uncountable, US) An act of masturbation. / (film) A stunt in which the performer is suddenly pulled off a horse, etc. by means of a cable.