Noun

The act of excluding or shutting out; removal from consideration or taking part.

* {{quote-news

, year=2011 , date=September 2 , author=Phil McNulty , title=Bulgaria 0-3 England , work=BBC citation , page= , passage=It was also a satisfying night for England coach Capello. Not only did he have a vital victory to celebrate, but his team selection was fully justified as Cahill gave an almost flawless performance in defence and Scott Parker's display made light of the surprising exclusion of Frank Lampard.}}

(obsolete) The act of pushing or forcing something out.

* 1646 , Sir Thomas Browne, Pseudodoxia Epidemica , III.6:

For the exclusion of animals is not merely passive like that of eggs, nor the total action of delivery to be imputed unto the mother, but the first attempt beginneth from the infant [...].

An item not covered by an insurance policy.

Noun

(boundaries)

The dividing line or location between two areas.

*

*:So this was my future home, I thought!Backed by towering hills, the but faintly discernible purple line of the French boundary off to the southwest, a sky of palest Gobelin flecked with fat, fleecy little clouds, it in truth looked a dear little city; the city of one's dreams.

(cricket) An edge or line marking an edge of the playing field.

(cricket) An event whereby the ball is struck and either touches or passes over a boundary (with or without bouncing), usually resulting in an award of 4 (a four) or 6 (a six) runs respectively for the batting team.

(topology) (of a set) the set of points in the closure of a set $S$, not belonging to the interior of that set.