Emily Dickinson Lexicon

Gabriel (-s), proper n. [Heb. 'valiant man of God'.]

1. Angel; archangel; divine messenger; holy personage; spiritual being who announced the mission of John the Baptist to Zacharias and the birth of Jesus Christ to Mary; (see Daniel 8 & 9; Luke 1; ED's letters).
2. Gabriel Lajuenesse; Evangeline's betrothed; male protagonist who dies in Henry Wadsworth Longfellow's narrative poem Evangeline.
3. Songbird; [fig.] oracle; prophet; bearer of glad tidings.