Cranny \Cran"ny\ (kr[a^]n"n[y^]), n.; pl. {Crannies} (-n[i^]z). [F. cran notch, prob. from L. crena (a doubful word).] 1. A small, narrow opening, fissure, crevice, or chink, as in a wall, or other substance. In a firm building, the cavities ought not to be filled with rubbish, but with brick or stone fitted to the crannies. --Dryden. He peeped into every cranny. --Arbuthnot. 2. (Glass Making) A tool for forming the necks of bottles, etc.