a rule that moves embedded clauses out to the end of the main clause, converting, for example, A man who will help has just arrived into A man has just arrived who will help
extraposition in American English
(ˌekstrəpəˈzɪʃən)
noun
Linguistics
a rule of transformational grammar that shifts a subordinate or modifying clause to the end of a sentence, as in changing That you sign the paper is necessary to It is necessary that you sign the paper.
Word origin
[1925–30; extra- + position; appar. coined by Otto Jespersen]This word is first recorded in the period 1925–30. Other words that entered Englishat around the same time include: Nazi, decibel, distinctive feature, dropout, reflex cameraextra- is a prefix meaning “outside,” “beyond,” freely used as an English formative. Otherwords that use the affix extra- include: extra-atmospheric, extrajudicial, extraterritorial