Cranny

n. [Fr. cran, Lat. crēna, notch.]

1Sense 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.

2Sense 2. A secret, retired place; a hole.

He peeped into every cranny. Arbuthnot.

3Sense 3. (Glass-making.) An iron instrument for forming the necks of glasses.

a. [Probably for cranky. See CRANK, a., 2.] Quick; giddy; thoughtless. Halliwell.