4. To perform on the stage; to represent a character.

To show the world how Garrick did not act.

Cowper.

To act as or for, to do the work of; to serve as. -- To act on, to regulate one's conduct according to. -- To act up to, to equal in action; to fulfill in practice; as, he has acted up to his engagement or his advantages.

Act"a*ble (&?;), a. Capable of being acted. Tennyson.

Ac"ti*nal (&?;), a. [Gr. &?;, &?;, ray.] (Zoöl.) Pertaining to the part of a radiate animal which contains the mouth. L. Agassiz.

||Ac`ti*na"ri*a (&?;), n. pl. [NL., from Gr. &?;, &?;, ray.] (Zoöl.) A large division of Anthozoa, including those which have simple tentacles and do not form stony corals. Sometimes, in a wider sense, applied to all the Anthozoa, expert the Alcyonaria, whether forming corals or not.

Act"ing (&?;), a. 1. Operating in any way.

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