an act or instance of excluding.

the state of being excluded.

Physiology . a keeping apart; blocking of an entrance.

noun

acceptance , addition , admittance , allowance , inclusion , incorporation , welcome

noun

ban , bar , blackball * , blockade , boycott , coventry , cut , debarment , debarring , discharge , dismissal , ejection , elimination , embargo , eviction , exception , excommunication , interdict , interdicting , interdiction , keeping out , lockout , nonadmission , occlusion , omission , ostracism , ousting , preclusion , prevention , prohibition , proscription , refusal , rejection , relegation , removal , repudiation , segregation , separation , suspension , veto , expulsion , purdah