Knowles collected ideas about a theory of adult education from the end of World War II until he was introduced to the term "andragogy". In 1966, Knowles met Dusan Savicevic in Boston. Savicevic was the one who shared the term andragogy with Knowles and explained how it was used in the European context. In 1967, Knowles made use of the term "androgogy" to explain his theory of adult education. Then after consulting with Merriam-Webster, he corrected the spelling of the term to "andragogy" and continued to make use of the term to explain his multiple ideas about adult learning.