Real Dictionary

abort
verb: If an unborn baby is aborted, the pregnancy is ended deliberately and the baby is not born alive.
verb: If someone aborts a process, plan, or activity, they stop it before it has been completed.

abort in American English
a premature termination of a flight, mission, etc.
to end (a pregnancy) prematurely
to give birth before the embryo or fetus is viable; have a miscarriage
intransitive verb: to bring forth a fetus from the uterus before the fetus is viable; miscarry
noun: a missile, rocket, etc., that has aborted
transitive verb: to cause to bring forth (a fetus) from the uterus before the fetus is viable

abort in British English
noun: the premature termination or failure of (a space flight, military operation, etc)
verb: to undergo or cause (a woman) to undergo the termination of pregnancy before the fetus is viable