an implement used to propel or steer a boat
"He lifted his oar from the water as he steered the small rowboat toward the dock."
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.
"The new boat design utilizes an OAR to maintain its classic proportions while improving fuel efficiency."
Initialism of original aspect ratio.
To row; to travel with, or as if with, oars.
"The captain ordered everyone to take their seats and begin oaring through the calm morning mist."
The word oar comes from the Old English ār, which originally meant a paddle used for rowing. It is related to the Old Norse word ár.