An aircraft that flies alongside another, to advise or photograph it while experimental flights are being carried out.

plural of chase gun

Used other than figuratively or idiomatically: see chase, after. / (idiomatic) To pursue someone with romantic intentions; to woo.

(idiomatic) To pursue something illusory, impractical, or impossible.

(Britain, New Zealand) To follow up, so as to ensure completion.

(mathematics, somewhat informal) A proof in stages, each of which, in general, depends on the previous stages and can be visualized by means of a diagram of morphisms.

plural of diagram chase

(mathematics, somewhat informal) Proof in stages, each of which, in general, depends on the previous stages and can be visualized by means of a diagram of morphisms.

(transitive, idiomatic) To drive someone or something away.

plural of run chase