billow

From Wiktionary

Pronunciation[change]

Noun[change]

Singular
billow

Plural
billows

  1. (countable) A billow is a large wave of something, such as water or smoke.

Verb[change]

Plain form
billow

Third-person singular
billows

Past tense
billowed

Past participle
billowed

Present participle
billowing

  1. If something billows, it surges and fills the air around it.