Modern definition: When someone's penis excretes semen during sex.
Older Definition: To shout
Modern: If you or your partner ejaculates during unprotected sex, you or they have a chance of getting pregnant.
Older: 'Wretched inmates!' I ejaculated, mentally, 'you deserve perpetual isolation from your species for your churlish inhospitality.'
-Wuthering Heights by Emily Bronte