What is the meaning of Lark?

Any of various small, singing passerine birds of the family Alaudidae.

Any of various similar-appearing birds, but usually ground-living, such as the meadowlark and titlark.

One who wakes early; one who is up with the larks.

A jolly or peppy person.

To catch larks (type of bird).

A frolic or romp, some fun.

A prank.

To sport, engage in harmless pranking.

To frolic, engage in carefree adventure.

heavens

Source: wiktionary.org