What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
1Mining the upper surface or part of a working or seam (now rare).
2Roofing, especially of a decorative kind.
3Work or repairs carried out on a roof.
Mid 17th century; earliest use found in Edward Manlove (bap. 1615, d. 1671), lawyer and poet.