A sentence is a grammatical unit that is composed of one or more clauses or of written texts delimited by upper case letters and markers such as . , ? and ! .

In non-functional linguistics, a sentence is a textual unit consisting of one or more words that are grammatically linked. In functional linguistics, a sentence is a unit of written texts delimited by graphological features such as upper case letters and markers such as periods, question marks, and exclamation marks.