(Tyneside) The grub of the mayfly and similar insects.

(idiomatic) A strict set of rules, or great scrutiny or oversight which limit one's freedom of action.

(idiomatic) Used to suggest an understatement.

(botany) a measure of leaf thickness, calculated by dividing the area of a portion of a leaf by the dry weight of that same portion of leaf.

(transitive) To abandon a person or other living creature that is injured or otherwise incapacitated, assuming that the death of the one abandoned will soon follow.

Learning conducted via electronic media, especially via the Internet.

(now chiefly Scotland) Loyal, honest. / (now only Scotland) True, genuine.

simple past tense and past participle of leaf

(chiefly in combination) Having a leaf or leaves (of the specified kind).

A permit once granted to convicts allowing them to leave prison under certain circumstances; used especially of convicts transported to the British colonies