From HomoExcelsior

1. To give birth before the embryo or fetus is capable of surviving on its own; miscarry.
2. To cease growth before full development or maturation.
3. To terminate an operation or procedure, as with a project, a missile, an airplane, or a space vehicle, before completion.
4. To cause to terminate pregnancy prematurely, before the embryo or fetus is viable.
5. To cause the expulsion of (an embryo or fetus) before it is viable.
6. abort plans for a corporate takeover.
7. abort a trip because of illness; abort a spaceflight; abort a takeoff.
8. To stop the progress of (a disease, for example).
9. The act of terminating an operation or procedure, as with a project, a missile, an airplane, or a space vehicle, before completion.
10. A procedure to terminate execution of a program when an unrecoverable error or malfunction occurs.