a combination of related words within a sentence that occurs more frequently than would be predicted in a random arrangement of words; a combination of words that occurs with sufficient frequency to be recongizable as a common combination, especially a pair of words that occur adjacent to each other. Also called stable collocation. Combinations of words having intervening words between them, such as verb and object pairs, may also be collocations.
In EJB collocation means that the enterprise bean is deployed on the same node as its client. In other words they are located in the same JVM.
The environment that words are commonly found in. The tightest sort of collocation is an idiom, a set expression; you can't alter the expression "You must be joking!" (? "You must be walking!") - it's fixed. But, taking the example of the word "drive" : although it is often found with "car", it's also found with "sheep" ,"cows" and "bargains" (but the bargains have to be "hard").