(chiefly US, Canada, politics, derogatory) One who desires that abortion be illegal, and thus that pregnant women be required to carry to term and give birth in all or most cases; a pro-lifer.
1997, in The American Spectator, volume 30, page 88:... that we are English, for there is something peculiarly English about modern abortion, and that is why we can bravely claim to be, as the forced-birthers snarl, the abortion capital of the world, no less.