Meaning of the word unprompted in English

What does unprompted mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

unprompted

US /ʌnˈprɑːmp.tɪd/
UK /ʌnˈprɒmp.tɪd/

Adjective

done or said without being prompted, suggested, or encouraged; spontaneous

Example:
The child offered an unprompted apology for breaking the vase.
His unprompted generosity surprised everyone.