AGGLUTINATION, a term used technically in philology for the method of word-formation by which two significant words or roots are joined together in a single word to express a com bination of the two meanings each of which retains its force (Lat. ad and glutinare, lit. to fasten together with glue). This juxtaposition or conjoining of roots is characteristic of languages such as the Turkish and Japanese, which are therefore known as agglutinative, as opposed to others, known generically as in flexional, in which differences of termination or combinations in which all separate identity disappears are predominant.
The term was also formerly used by associationist philosophers for those mental associations which were regarded as peculiarly close. W. Wundt applies this term to those simplest cases of apperceptive synthesis in which the simpler ideas composing the complex idea retain their independence—as, for instance, in the idea expressed by "church-steeple."