Ascending rivers from the sea, at certain seasons, for
breeding, as the salmon, shad, etc.
Tending upwards; -- said of terns in which the lowest
secondary segments are on the upper side of the branch of the central
stem.
1. To be obliged; to be necessitated; -- expressing either physical or moral necessity; as, a man must eat for nourishment; we must submit to the laws. 2. To ...