1.Definition: (descriptive linguistics) the process whereby new words are formed from existing words or bases by affixation
"`singer' from `sing' or `undo' from `do' are examples of derivations"
3.Definition: a line of reasoning that shows how a conclusion follows logically from accepted propositions
7.Definition: the act of deriving something or obtaining something from a source or origin
8.Definition: the source or origin from which something derives (i.e. comes or issues)
"He prefers shoes of Italian derivation", "Music of Turkish derivation"