{{about|automated generation and recognition of paraphrases||Paraphrase (disambiguation)}}
'''Paraphrase''' or '''Paraphrasing''' in [[computational linguistics]] is the [[natural language processing]] task of detecting and generating [[paraphrase]]s. Applications of paraphrasing are varied including information retrieval, [[question answering]], [[Automatic summarization|text summarization]], and [[plagiarism detection]].<ref name=Socher /> Paraphrasing is also useful in the [[evaluation of [[machine translation]],<ref name=Callison>{{cite conference|last=Callison-Burch|first=Chris|title=Syntactic Constraints on Paraphrases Extracted from Parallel Corpora|book-title=EMNLP '08 Proceedings of the Conference on Empirical Methods in Natural Language Processing|date=October 25–27, 2008|place=Honolulu, Hawaii|pages=196–205|url=https://dl.acm.org/citation.cfm?id=1613743}}</ref> as well as [[semantic parsing]]<ref>Berant, Jonathan, and Percy Liang. "[http://www.aclweb.org/anthology/P14-1133 Semantic parsing via paraphrasing]." Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers). Vol. 1. 2014.</ref> and [[natural language generation|generation]] of new samples to expand existing [[Text corpus|corpora]].<ref name=Barzilay />
