A genre of art in which the transmission of ideas is more important than the creation of an art object

Of, or relating to concepts or mental conception. / Existing only in the imagination. / Of or relating to conceptualism.

A short and/or incomplete realization of a certain method or idea to demonstrate its feasibility. / (software engineering, perhaps nonstandard) A proof of technology or pilot project.

(music) A musical instrument, like the various accordions, that is a member of the free-reed family of musical instruments, typically having buttons on both ends.

to become compressed into a shape reminiscent of a concertina / to be drawn closer and farther apart repeatedly, or up and down, as if situated on a working concertina's folds

Either concept, the inverse of the other, of a conceptual pair.

(transitive, obsolete) To acquire, to procure. / (transitive, now rare) To reconcile (discordant theories, demands etc.); to make compatible, bring together.

Not dilute; having a high concentration. / Intense; directed towards a specific location.

simple past tense and past participle of concentrate

(intransitive) To end; to come to an end. / (transitive) To bring to an end; to close; to finish. / (transitive) To bring about as a result; to effect; to make.