- To sexually penetrate.
1948, Journal of Clinical and Experimental Psychopathology & Quarterly Review of Psychiatry and Neurology, Volume 9 (Psychiatry), page 443:
- She attempts to get on top of smaller boys and pretends to coitize them, in a manner which is forbidden to "good women", ...
1959, Journal of the Hillside Hospital, Volume 8 (Psychiatry), Digitized edition, published 2009, page 272:
- "Will you all allow me to coitize you? Now, traditionally, the man is viewed as the coitizer and the woman as the coitized one.