Ex means without.(preposition)
An example of ex used as a preposition is in the latin legal phrase "ex parte" which means by or for one party, without any of the parties having to be present.
Ex is defined as to get rid of or cross something out.(verb)
An example of to ex is to cross an item off a shopping list.
Ex is slang and is defined as a past partner.(noun)
An example of an ex is a husband from a previous marriage.
See ex in Webster's New World College Dictionary
noun pl. exes
Origin: ME < OFr or L, akin to Gr ex-, exō-, ek- < IE base *eĝhs, out
See ex in American Heritage Dictionary 4
Origin: Latin; see eghs in Indo-European roots.
Origin: From ex-.
Origin: Middle English
Origin: , from Old French
Origin: , from Latin and Greek; see eghs in Indo-European roots.
Learn more about ex