noun

1. The expulsion from the womb of a foetus or embryo before it is fully developed, with loss of the foetus; either naturally as a spontaneous abortion (now usually called a miscarriage), or deliberately as an induced abortion.

2. An aborted foetus; an abortus.

3. A misshapen person or thing; a monstrosity.

4. Failure or abandonment of a project, promise, goal etc.

5. Arrest of development of any organ, so that it remains an imperfect formation or is absorbed.

6. The cessation of an illness or disease at a very early stage.