What does "evening" mean?

Evening: The latter portion, as of life; the declining period, as of strength or glory. Note: Sometimes used adjectively; as, evening gun. "Evening Prayer." Shak. Evening flower (Bot.), a genus of iridaceous plants (Hesperantha) from the Cape of Good Hope, with sword-shaped leaves, and sweet-scented flowers which expand in the evening. -- Evening grosbeak (Zoöl.), an American singing bird (Coccothraustes vespertina) having a very large bill. Its color is olivaceous, with the crown, wings, and tail black, and the under tail coverts yellow. So called because it sings in the evening. -- Evening primrose. See under Primrose. -- The evening star, the bright star of early evening in the western sky, soon passing below the horizon; specifically, the planet Venus; -- called also Vesper and Hesperus. During portions of the year, Mars, Jupiter, and Saturn are also evening stars. See Morning Star.