The noun has 5 meanings:
Meaning #1:
United States architect known for his steel framed skyscrapers and for coining the phrase `form follows function' (1856-1924)
Synonyms: Louis Sullivan, Louis Henry Sullivan, Louis Henri Sullivan
Meaning #2:
United States psychiatrist (1892-1949)
Synonym: Harry Stack Sullivan
Meaning #3:
United States host on a well known television variety show (1902-1974)
Synonyms: Ed Sullivan, Edward Vincent Sullivan
Meaning #4:
United States educator who was the teacher and lifelong companion of Helen Keller (1866-1936)
Synonyms: Anne Sullivan, Anne Mansfield Sullivan
Meaning #5:
English composer of operettas who collaborated with the librettist William Gilbert (1842-1900)
Synonyms: Arthur Sullivan, Arthur Seymour Sullivan, Sir Arthur Sullivan




