3. (Arch.) Same as Apse.

Apt (&?;), a. [F. apte, L. aptus, fr. obsolete apere to fasten, to join, to fit, akin to apisci to reach, attain: cf. Gr. &?; to fasten, Skr. pta fit, fr. p to reach attain.] 1. Fit or fitted; suited; suitable; appropriate.

They have always apt instruments.

Burke.

A river . . . apt to be forded by a lamb.

Jer. Taylor.

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