Definition of first responder in English:

first responder

Line breaks: first re|spond¦er

noun

North American
A person whose job entails being the first on the scene of an emergency, such as a firefighter or police officer.

Definition of first responder in:

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Word of the day fioritura
Pronunciation: fɪˌɔːrɪˈt(j)ʊərə
noun
an embellishment of a melody...