01 n. One who informs, animates, or inspires.
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1.
One who informs, animates, or inspires.[Obs.]“Nature, informer of the poet's art.” — Pope.
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2.
One who informs, or imparts knowledge or news.
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3.
One who informs a magistrate of violations of law; one who informs against another for violation of some law or penal statute.(Law)
Phrases & compounds
Common informer —
one who habitually gives information of the violation of penal statutes, with a view to a prosecution therefor.