What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
1with object To retrace (a course, period of time, etc.); to follow (one's track) again.
2no object To go back, to retrace one's steps.
3To replace (a train or its wheels) on the track after a derailment.
4To lay new track for (a railway line, etc.).
Late 18th century. From re- + track.