Definition of swap:

part of speech: noun

A blow; stroke.

part of speech: adverb

Hastily; at a blow.

part of speech: noun

A blow; a stroke.

part of speech: verb

To strike with a hasty sweeping biv; to fall down with sudden violence; to exchange; to barter.

Usage examples:

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ronde bosse

In arch., a term applied to sculptured objects in their full forms, in contradistinction to those which are in relief, or attached more or less to a plane or ground. ...