exclude

v.

1. To bar

   shut out, keep out, reject, ban, debar, eliminate, except, omit, prohibit, disallow, rule out, lock out, shut the door on; see also bar 1, 2.

2. To expel

   banish, suspend, put out, force out, disbar, eject, throw out; see also dismiss 1.

exclude implies a keeping out or prohibiting of that which is not yet in to exclude someone from membership; debar connotes the existence of some barrier, as legal authority or force, which excludes someone from a privilege, right, etc. to debar certain groups from voting; disbar refers only to depriving a lawyer of the right to practice law; eliminate implies the removal of that which is already in, usually connoting its undesirability or irrelevance to eliminate waste products, to eliminate fraud; suspend refers to the removal, usually temporary, of someone from some organization, institution, etc., as for the infraction of some rule to suspend a student from school