1. an instrument for propelling a boat, sometimes used also for steering, consisting of a long shaft of wood with a blade at one end.
2. something resembling this or used for a similar purpose.
3. ® oarsman.
-- verb (t)
4. to propel with or as with oars; row.
5. to make (one's way), by or as if by rowing.
6. put one's oar in, to interfere; meddle.
7. rest on one's oars, to relax; take things easily.
[ME ore, OE ar, c. Icel. ar ]
-- oarless, adjective -- oarlike, adjective