n. A joining; junction.n. The line or point at which two bodies are joined; a joint or articulation; a seam.n. A point of time; particularly, a time rendered critical or important by a concurrence of circumstances; a conjuncture.n. In geometry, either the instantaneous union of a collection of objects which are just moving in coincidence of place, thereafter to be for some lapse of time one object, or the instantaneous loss of one or more dimensions by the gradual shrinkage of a body, this smaller dimensionality lasting through a period of time.