noun an oarsman; a rower; as, he is a good oar.
2. oar ·vt & ·vi to row.
3. oar ·noun an oarlike swimming organ of various invertebrates.
4. oar ·noun an implement for impelling a boat, being a slender piece of timber, usually ash or spruce, with a grip or handle at one end and a broad blade at the other. the part which rests in the rowlock is called the loom.