Being married to one person at a time. / (zoology) Having only one sexual partner at a time. / (botany) Monogamic; having a simple flower with united anthers.

(botany) Any plant whose seedlings typically have one cotyledon (seed leaf) (in contrast to the two cotyledons typical of dicots), thereby belonging to the taxonomic monocots, formerly variously known as Monocotyledones, Monocotyledonae, or Liliopsida, a class in the angiosperms (Angiospermae), the flowering plants.

The practice of having a succession of (especially short) monogamous relationships with different people.

(drama, authorship) A long speech by one person in a play; sometimes a soliloquy; other times spoken to other characters. / (comedy) A long series of comic stories and jokes as an entertainment.

To deliver a monologue.

Of or resembling a monolith. / Consisting of a single chunk of hard material rather than an assembly of discrete parts.

Acting in the manner of a monopoly.

One who has, or attempts to acquire, a monopoly on something.

(transitive) To have a monopoly on something. / (transitive) To dominate or to get total control of something by excluding everyone else.

A black and white image, especially such a photograph. / (dated) A painting executed in shades of a single colour. / A ceramic glaze of a single colour; an object so glazed.