Easton's Bible Dictionary
The living creatures in Ezek. 10:15, 17, are imaginary beings, symbols of the Divine attributes and operations.
Noah Webster's New International Dictionary of the English Language
1. (n.) Anything created; anything not self-existent; especially, any being created with life; an animal; a man.
2. (n.) A human being, in pity, contempt, or endearment; as, a poor creature; a pretty creature.
3. (n.) A person who owes his rise and fortune to another; a servile dependent; an instrument; a tool.
4. (n.) A general term among farmers for horses, oxen, etc.