lass /læs/ noun5 •(dialect, informal) A girl; also (by extension), a young woman.Come and dance, ye lads and lasses! •(dialect, informal) A female member of the Salvation Army; a hallelujah lass.Jenny Hill, a pale, overwrought, pretty Salvation lass of 18, comes in through the yard gate, leading Peter Shirley, a half hardened, half worn-out elderly man, weak with hunger. — 1905 •(dialect, informal) A term of address for a woman, or a female animal.As fair art thou, my bonie lass, / So deep in luve am I; / And I will luve thee still, my Dear, / Till a' the seas gang dry. — 1794 •(dialect, informal) A sweetheart.But first him seemed fit, that vvounded Knight / To visite, after this nights perillous passe, / And to salute him, if he vvere in plight, / And eke [also] that Lady his faire louely lasse. — 1596 •(dialect, informal) A female servant; a maid, a maidservant.[…] I'll tell ye that after we are done wi' our supper, for it will may be no be sae weel to speak about it while that lang-lugged limmer o' a lass is gaun flisking in and out o' the room. — 1815 formslasses