Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to derivational: Derivational morpheme


a. The act or process of deriving.
b. The state or fact of being derived; origination: a custom of recent derivation.
c. Something derived; a derivative.
2. The form or source from which something is derived; an origin.
3. Linguistics
a. The historical origin and development of a word; an etymology.
b. The process by which words are formed from existing words or bases by adding affixes, as singer from sing or undo from do, by changing the shape of the word or base, as song from sing, or by adding an affix and changing the pronunciation of the word or base, as electricity from electric.
c. In generative linguistics, the generation of a linguistic structure through an ordered or partially ordered series of operations on other structures, such as the creation of a surface structure from a deep structure, or of a complex word from its morphological components.
d. The formal description of the process of such generation.
4. Logic & Mathematics A logical or mathematical process indicating through a sequence of statements that a result such as a theorem or a formula necessarily follows from the initial assumptions.

der′i·va′tion·al adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.derivational - characterized by inflections indicating a semantic relation between a word and its base; "the morphological relation between `sing' and `singer' and `song' is derivational"
inflectional - characterized by inflections indicating grammatical distinctions; "inflectional morphology is used to indicate number and case and tense and person etc."
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


Stemming from an original source:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Several definitions of competition in derivational morphology have been put forward in the last 40 years.
Pilch finds some parts of the inflectional morphology of Old English that display i-mutation (such as the singular second and third persons of the present indicative of strong verbs) and, above all, a noteworthy set of derivational processes in which a relation often holds between an i-unmutated base of derivation and an i-mutated derivative (1970, 88).
Paninian Grammar through Its Examples serves as a lexical resource by providing semantic and cultural information embedded in the derivation of words in the Paninian grammatical system while it serves as a research aid and educational resource by providing examples of how the Paninian derivational system works.
Among their topics are the derivational nature of reduplication and its relation to boundary phenomena, reduplication and repetition in Russian Sign Language, fixer-uppers: reduplication in the derivation of phrasal verbs, focus on repetition: the role of focus and repetition in echo questions, and an analysis of two forms of verbal mimicry in troubles talk conversations between strangers and friends.
In that context he pointed out there were five approaches to them: Instrumentalist, Structuralist, Derivational, System Analystic and Organisational Realist.
Aspect is primarily encoded by derivational suffixes (for details, see Zaicz 2006 : 203-204; Hallap 2000 : 31-51; [phrase omitted] 1980 : 335-344), e.g.
a list of morphemes, both inflectional and derivational;
The findings suggest that teachers should consider how a focus on morphology, and its associated derivational complexities, could benefit the literacy development of students with LLD.
A teacher may, for example, invite children to explore how the derivational suffixes, /-ian/ and /-ion/, differ in function and in spelling (see Figure 7).
Williams (1981) holds that "the head of a constituent plays a crucial role in the description of the distribution of the diacritic features related to both inflectional and derivational morphology.