What is the meaning of Oar?

A type of lever used to propel a boat, having a flat blade at one end and a handle at the other, and pivoted in a rowlock atop the gunwale, whereby a rower seated in the boat and pulling the handle can pass the blade through the water by repeated strokes against the water's resistance, thus moving the boat.

An oarsman; a rower.

An oar-like swimming organ of various invertebrates.

To row; to travel with, or as if with, oars.

other

different

Source: wiktionary.org