[1] : The Collaborative International Dictionary of English v.0.48

oar \oar\ =or, n as. =ar; akin to icel. =ar, dan. aare,
   sw. ara; perh. akin to e. row, v. cf. rowlock.
   1913 webster
   1. 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.
      1913 webster

   note: an oar is a kind of long paddle, which swings about a
         kind of fulcrum, called a rowlock, fixed to the side of
         the boat.
         1913 webster

   2. an oarsman; a rower; as, he is a good oar.
      1913 webster

   3. zool. an oarlike swimming organ of various
      invertebrates.
      1913 webster

   oar cock
      zool., the water rail. prov. eng.

   spoon oar, an oar having the blade so curved as to afford a
      better hold upon the water in rowing.

   to boat the oars, to cease rowing, and lay the oars in the
      boat.

   to feather the oars. see under feather., v. t.

   to lie on the oars, to cease pulling, raising the oars out
      of water, but not boating them; to cease from work of any
      kind; to be idle; to rest.

   to muffle the oars, to put something round that part which
      rests in the rowlock, to prevent noise in rowing.

   to put in one's oar, to give aid or advice; -- commonly
      used of a person who obtrudes aid or counsel not invited.
      

   to ship the oars, to place them in the rowlocks.

   to toss the oars, to peak the oars, to lift them from the
      rowlocks and hold them perpendicularly, the handle resting
      on the bottom of the boat.

   to trail oars, to allow them to trail in the water
      alongside of the boat.

   to unship the oars, to take them out of the rowlocks.
      1913 webster
see also:
rowlock oar cock spoon oar to boat the oars to feather the oars feather 
to lie on the oars to muffle the oars to put in one's oar to ship the oars to toss the oars 
to trail oars to unship the oars 

Feather >> F Words
Feather, definition of term: Feather
feather_pag1.html

Feather Duster >> F Words
Feather Duster, definition of term: Feather Duster
feather+duster_pag1.html

White Feather >> W Words
White Feather, definition of term: White Feather
white+feather_pag1.html

Tar And Feather >> T Words
Tar And Feather, definition of term: Tar And Feather
tar+and+feather_pag1.html