I
n.
1) to make a dive
2) a swallow (BE), swan (AE) dive
3) a back; headfirst; high dive
4) a crash dive (of a submarine)
5) a power dive (of a plane)
6) a dive for (they made a dive for the ditch)
7) a dive from; into
8) (misc.) (colloq.) to take a dive ('to lose a contest deliberately')
II
v.
1) to dive headfirst
2) (D; intr.) to dive from; into (she dived into the pool from the high diving board)