(idiomatic) It is not possible to repeat past experiences, as time changes all things.

(cliché, idiomatic) (used imitatively) A cliché used to exaggerate an accomplishment or milestone.

(in the narrow sense) A husband of one's biological mother after her initial marriage to or relationship with one's biological father.

The wife of one's biological father, other than one's biological mother. / (botany, rare) A viola, especially Viola tricolor, heartsease.

The son of one's spouse, but not one's own child.

The son of one's stepparent who is not the son of either of one's biological parents. / The stepson of one's parent who is not one's half-brother.

The daughter of one's spouse and not of oneself.

The daughter of one's stepparent who is not the daughter of either of one's parents. / The stepdaughter of one's parent which is not one's half-sister.

The grasslands of Eastern Europe and Asia. Similar to (North American) prairie and (African) savanna. / A vast cold, dry grass-plain.

The child of one's spouse but not one's own. / (obsolete) A bereaved child; one who has lost father or mother.