01 n. A side or incidental blow; an accidental blow.
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1.
A side or incidental blow; an accidental blow.“With their by-blows they did split the very stones in pieces.” — Bunyan.
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2.
An illegitimate child; a bastard.“The Aga speedily . . . brought her [his disgraced slave] to court, together with her pretty by-blow, the present Padre Ottomano.” — Evelyn.