Definition of lettice:
(n) :
(dated) A female given name from Latin, variant of Letitia.
(n) :
(historical) A kind of whitish-grey fur from the winter coat of the least weasel.
(n) :
Obsolete spelling of lettuce; however, more often a misspelling of lettuce. [An edible plant, Lactuca sativa and its close relatives, having a head of green or purple leaves.]