A lass, girl or quine is a female bairn. She is a female body that isna yet matured, awtho female teenagers mey be cried “girls” an aw. Whiles aulder fowk still caw growen up weemen as “girls”, parteecular in expressions sic as “a nicht oot wi the lassies”.

Twa youthie lasses
A Venezuelan lass

Wee lasses still hae the bouk o a bairn. It isna till thay reach puberty (aiblins aroond 11 tae 13 year auld) that thair bouks stairt tae mature an thay become a wumman.

The opposite o a lass is a lad/loun. A lad is a male bairn that will growe intae a man.