Webster’s Revised Unabridged Dictionary · 1913 Knurly Knurl′y (nûrl′y̆), [Compar. Knurlier (-ĭ·ẽr); superl. Knurliest.] [See Knur, and cf. Gnarly.] Full of knots; hard; tough; hence, capable of enduring or resisting much. ‹ Knurled Knurry ›