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the minimal meaningful part of an utterance; a specific representation of a morpheme in a text; one of the variants of a morpheme with nonidentical elements, as in the Russian alternation:
(3) /nash/ivat’ [The above three infinitives all contain a morpheme having the basic meaning of “to carry” or “to wear.” Their meaning and usage differs according to their mode of action (in Russian, sposob deistviia; in German, Aktionsart).}
The choice of a morph depends upon its phonological or morphological environment and is subject either to the rules of complementary distribution, as in English plural formants /-s/, /-z/, and /-Iz/, or to the rule of free variation, as in Russian bel/oi/ sten/oi/—bel/oiu/ sten/oiu/ (instrumental singular of belaia stena, “white wall“). The morphs of a single morpheme are known as its allomorphs.