noun

1. A person who fishes with a hook and line.

   "A throng of anglers lined the trout stream on opening day of trout season."

2. An angler fish, Lophius piscatorius.

   "The angler lured a smaller fish into reach with the appendage on its head."

3. Someone who tries to work an angle; a person who schemes or has an ulterior motive.

   "Jonas was a consummate angler when it came the company's leave policy; he had it figured so he only needed to work six months out of the year."

4. (thieves' cant) A thief who uses a hooked stick to steal goods out of shop-windows, grates, etc.