on/as a lark

phrase

US, informal

: just as a way to have fun

She entered the race on/as a lark.

Browse Nearby Words

on a rotating basis

on/as a lark

on a scale of

Cite this Entry

Style

“On/as a lark.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%2Fas%20a%20lark. Accessed 6 Mar. 2026.

Copy Citation

Popular in Grammar & Usage

More Words You Always Have to Look Up

5 Verbal Slip Ups and Language Mistakes

Is it 'nerve-racking' or 'nerve-wracking'?

The Difference Between 'i.e.' and 'e.g.'

Democracy or Republic: What's the difference?

Popular in Wordplay

on/as a lark

phrase

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

vaunted

Popular in Grammar & Usage

More Words You Always Have to Look Up

5 Verbal Slip Ups and Language Mistakes

Is it 'nerve-racking' or 'nerve-wracking'?

The Difference Between 'i.e.' and 'e.g.'

Democracy or Republic: What's the difference?

Popular in Wordplay

The Words of the Week - Mar. 6

Why do we say 'make a beeline'?

Why do we call it a 'flea market'?

17 Words for Dog Breeds

Birds Say the Darndest Things

Popular

More Words You Always Have to Look Up

The Words of the Week - Mar. 6

Why do we say 'make a beeline'?

Games & Quizzes