Emily Dickinson Lexicon

CRACK, n. [Gr. ῥαγας.]

1. A disruption; a chink or fissure; a narrow breach; a crevice; a partial separation of the parts of a substance, with or without an opening; as, a crack in timber, in a wall, or in glass.
2. A burst of sound; a sharp or loud sound, uttered suddenly or with vehemence; the sound of any thing suddenly rent; a violent report; as, the crack of a falling house; the crack of a whip.
3. Change of voice in puberty. – Shak.
4. Craziness of intellect; or a crazy person. – Addison.
5. A boast, or boaster. [Low.]
6. Breach of chastity; and a prostitute. [Low.]
7. A lad; an instant. [Not used.]