[f. med.L. castellāre to build or fortify as a castle, f. castellum CASTLE: See -ATE3.] a. trans. To build in the manner of a castle; to build with battlements. b. intr. (nonce-use.) To grow into a castle.

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1831.  J. Wilson, Unimore, i. 77. Clouds slowly castellating in a calm.

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1840.  H. Taylor, Autobiog. (1885), I. xx. 321. The citizen who castellates a Villa at Richmond.

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