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description of the structure of a language, consisting of the sounds (see phonology); the meaningful combinations of these sounds into words or parts of words, called morphemes; and the arrangement of the morphemes into phrases and sentences, called syntax.
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the minimal meaningful part of an utterance and one of the basic units of a language system. The characteristics of morphemes are meaningfulness—morphemes convey lexical or grammatical meaning; repeatability—morphemes retain the same (or similar) meaning and the same (or similar) form when they appear in different contexts; and nonreducibility— morphemes cannot be further divided into parts having the same characteristics. The morpheme is also defined as the smallest meaningful part of a word and as a class of morphs possessing specific characteristics.

The detection of a morpheme begins with the division of utterances in a language into morphs; then, morphs similar in content and form and found in complementary or noncontrastive distribution (not causing differences of meaning) are combined into a single morpheme. For example, the Russian morpheme drug, “friend,” has the morphs drug~druzh~druz’ This level of analysis, which establishes the allomorphs of a single morpheme, is called identification. Identification is followed by the classification of the morpheme. According to their position in the language system, morphemes are divided into free morphemes capable of behaving as independent words, such as English day, German Tag, and Russian tikh; bound morphemes that occur only as part of a word, such as the plural formant -s in English days, or the adjectival ending -ii in Russian tikhii, “quiet“); and relatively bound morphemes that may occur in both free and bound form, such as Russian do, used as preposition and as prefix, in doletef do reki, “to fly up to the river.”

Morphemes are divided by function into auxiliary (affixal) and nonauxiliary (radical), of which the former are usually bound and the latter free. As a rule, the number of affixal morphemes is limited to a few dozen, while the number of radical morphemes is unlimited. Affixal morphemes are divided according to types of meaning conveyed, into derivational (word-forming), relational (word-altering, or inflectional), and relational-derivational (form-creating). The last two categories are often combined under the term “word-altering.”

Morphemes may convey meaning not only by their phonological presence in a given word but also by their absence (zero ending, zero allomorph). For example, the Russian word stol, “table,” is construed as nominative singular since it lacks the morphemic plural marker -y (Russian stoly, “tables“) as well as any relational morphemes indicating oblique case (the sign for zero ending is -#, as in stol[-#]). Most linguists regard the morpheme as a unit that correlates linguistic expression with linguistic content, that is, as a two-sided semiotic unit. Less often, the morpheme is regarded as the smallest unit of linguistic expression.


References in periodicals archive ?
Figure 1, adapted from Goksel (2001), shows the schema for possible morpheme slots available for verbs (excluding derivational morphemes that may immediately follow the verb root) in main clauses.
Since, unlike the case of singular forms, we cannot isolate the morpheme marking gender and number from the derivational one, we may suppose that the new morpheme -enger- has a status of portmanteau, carrying two kinds of information (number and derivation) in a single morpheme (namely, we cannot identify which morpheme does carry plural information and which is the derivational morpheme, or better, we may surely affirm that the controller that selects the number of the inflection is not the source noun anymore).
As is commonly known, derivational morphemes have been referred to as affixes, and more specifically as suffixes, prefixes and infixes, in dependence on their position towards the base.
The alternations originated by purely phonological processes in the course of which former inflexional or derivational morphemes were lost as overt forms and were replaced by zero morphemes (or allomorphs), while the allophones of the stem vocalism or consonantism which had been conditioned by the vowel(s) of the lost morphemes were phonemicised.
The copulative verb stem -ba takes the regular verbal derivational morphemes. In the negative of the present tense, for instance, the copulative verb stem -ba occurs as -bi.
On the identification of competition in English derivational morphemes. The case of -dom, -hood and -ship.
Martin Arista (forthcoming a) offers a typology of zero-derivation phenomena in Old English that includes: (i) zero derivation with explicit inflectional morphemes and without explicit derivational morphemes, as in ridan 'to ride' > rida 'rider'; (ii) zero derivation without explicit or implicit morphemes, either inflectional or derivational, as in bidan 'to delay' > bid 'delay'; (iii) zero derivation without inflectional or derivational morphemes but displaying ablaut, as in drifan 'to drive' > draf 'action of driving'; and (iv) zero derivation with ablaut and formatives that can no longer be considered productive affixes, such as -m in fleon 'to fly' > fleam 'flight'.
In the analysis reported below, lexical items have been divided into predicates (lexemes) and affixes (derivational morphemes).
Similar problems concerning multifunctionality arise when, instead of analyzing grammatical morphemes, we turn our attention to derivational morphemes and word formation patterns in general.