What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
1A wooden frame placed around a hog's neck to prevent it pushing its way through hedges, fences, etc. (now rare).
2(Nautical) a quadrant (now historical).
Late 16th century; earliest use found in Thomas Tusser (c1524–1580), writer on agriculture and poet.