What does abortion mean?
The definition of abortion
A*bor”tion, n.
Etym: [L. abortio, fr. aboriri. See Abort.]

1 The act of giving premature birth; particularly, the expulsion of the human fetus prematurely, or before it is capable of sustaining life; miscarriage.

Note: It is sometimes used for the offense of procuring a premature delivery, but strictly the early delivery is the abortion, “causing or procuring abortion” is the full name of the offense. Abbott.

2 The immature product of an untimely birth.
3 (Biol.)
Arrest of development of any organ, so that it remains an imperfect formation or is absorbed.
4 Any fruit or produce that does not come to maturity, or anything which in its progress, before it is matured or perfect; a complete failure; as, his attempt. proved an abortiori.