lark in WordNet English dictionary

1. play boisterously
   "The children frolicked in the garden"; "the gamboling lambs in the meadows"; "The toddlers romped in the playroom"
   frolic  lark  rollick  skylark  disport  sport  cavort  gambol  frisk  romp  run around  lark about 
   

1. any carefree episode
   escapade  lark 
   
2. any of numerous predominantly Old World birds noted for their singing
   lark 
   
3. a songbird that lives mainly on the ground in open country; has streaky brown plumage
   pipit  titlark  lark 
   
4. North American songbirds having a yellow breast
   meadowlark  lark