D defs.my
Entry 2 senses Webster, 1913

collaborate

/kəl-ăb'-ẽr-ātˌ/ · col·lab·o·rate · IPA /kəˈlæb.ə.ɹeɪt/
01 v. i. to work together with another toward a common goal, especially in an intellectual endeavor; as, four chemists collaborated on the synthesis…
  1. 1.
    to work together with another toward a common goal, especially in an intellectual endeavor; as, four chemists collaborated on the synthesis of the compound; three authors collaborated in writing the book.
  2. 2.
    to willingly cooperate with an enemy, especially an enemy nation occupying one's own country.