Definitions of Keller:

• noun:   United States lecturer and writer who was blind and deaf from the age of 19 months; Anne Sullivan taught her to read and write and speak; Helen Keller graduated from college and went on to champion the cause of blind and deaf people (1880-1968)
• name:  A surname (common: 1 in 2941 families; popularity rank in the U.S.: #321)