Liberal Dictionary English Dictionary
verb (used with or without object)
- to become or make broad.
verb
- to make or become broad or broader; widen
1727, from broad (adj.) + -en (1). The word seems no older than this date (discovered by Johnson in one of James Thomson’s “Seasons” poems); broadened also is first found in the same poet, and past participle adjective broadening is recorded from 1850.