abortion n. The termination of a pregnancy: a miscarriage or the premature expulsion of a foetus from the womb before the normal period of gestation is complete. It is an offence to induce or attempt to induce an abortion unless the terms of the Abortion Act 1967 and the Abortion Regulations 1991 are complied with. The pregnancy can only be terminated by a registered medical practitioner, and two registered medical practitioners must agree that it is necessary, for example because (1) continuation of the ...