1530s, "an agreement," from Middle French capitulation, noun of action from capituler "agree on specified terms," from Medieval Latin capitulare "to draw up in heads or chapters, arrange conditions," from capitulum "chapter," in classical Latin "heading," literally "a little head," diminutive of caput (genitive capitis) "head" (see capitulum). Meaning narrowed by mid-17c. to "make terms of surrender."