Wren

1. n. Any one of numerous species of small singing birds more or less resembling the true wrens in size and habits.
2. n. Any one of numerous species of small singing birds belonging to Troglodytes and numerous allied of the family Troglodytidae.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.