noun Grammar. 1.
a sentence in which
a simpler sentence is paraphrased by being divided into two parts, each with its own verb
, in order to emphasize certain information, especially a sentence beginning with expletive it
and a form of be
followed by the information being emphasized, as It was a mushroom that Alice ate
instead of Alice ate a mushroom.
2. Also called pseudo-cleft sentence.
a two-part sentence in which a subject or subject complement expresses information being emphasized and an indefinite relative clause corresponds to the rest of a simpler sentence that has been paraphrased, as A mushroom was what Alice ate
or What Alice ate was a mushroom.