(lärk) noun
1. Any of numerous small singing birds (family Alaudidae), as the European skylark (Alauda arvensis).
2. One of various other birds, as a titlark or meadowlark. [OE lāferce, læwerce]

(lärk) noun
A hilarious time; frolic; humorous adventure.
—v.i. To play pranks; frolic. [<dial. E (Northern) lake play, fusion of ON leika leap and OE lācan frolic; infl. in form by LARK¹]
—lark′er noun
—lark′some adjective