(idiomatic) An occupation, role, social class, or lifestyle.

(idiomatic, UK) Mouth-to-mouth resuscitation.

(painting) A work of art depicting an arrangement of inanimate objects. / (cellular automata) A pattern that does not change from one generation to the next.

(palmistry) A line on the palm of the hand, curving about the base of the thumb, supposed to indicate, by its form or position, the length of a person's life.

(of any representation, especially pictures, statues) The same size as the real thing.

(idiomatic, intransitive, derogatory) To begin having a more interesting, eventful, or worthwhile existence.

(chiefly US) Opposed to the practice or legalization of abortion. / (specifically) Opposed to the legalization of euthanasia. / (specifically) Opposed to the legalization of capital punishment.

(biology) The course of stages through which an organism passes from fertilized zygote until maturity, reproduction, and death.

plural of fact of life / (euphemistic) knowledge of sexual reproduction (almost always used with the)

Something that cannot be avoided.