Webster’s Revised Unabridged Dictionary · 1913 Inbreed In·breed′ (ĭn·brēd′), v. t. [imp. & p. p. Inbred; p. pr. & vb. n. Inbreeding.] [Cf. Imbreed.] 1. To produce or generate within. Bp. Reynolds. To inbreed and cherish . . . the seeds of virtue. Milton. 2. To breed in and in. See under Breed, v. i. ‹ Inbred Inburning ›