lay (up) in lavender v.
1. [late 16C–19C] (also lay, pack up in lavender) to pawn.
2. [17C–19C] to put out of harm’s way; to hide, e.g. from the police.
3. [17C–19C] to imprison.
4. [late 17C–19C] (also lie in lavender) to die.
1. in pawn.
2. [mid-17C; mid-19C–1930s] hidden from the police.
3. [late 18C] in a charity hospital.
4. [1930s] (US Und.) dead.