एक वाक्य म्हणजे व्याकरणदृष्ट्या एक किंवा अधिक शब्द असणारे भाषेचे एकक आहे. असे एक वाक्य निवेदन, प्रश्न, उद्गार, विनंती, आदेश किंवा सूचना व्यक्त करण्यासाठी वापरले जाऊ शकते. त्यासाठी, वाक्यामध्ये अर्थानुसार हवे ते शब्द समाविष्ट करता येतात. भाषाशास्त्र

In linguistics and grammar, a sentence is a linguistic expression, such as the English example "The quick brown fox jumps over the lazy dog." In traditional grammar, it is typically defined as a string of words that expresses a complete thought, or as a unit consisting of a subject and predicate. In non-functional linguistics it is typically defined as a maximal unit of syntactic structure such as a constituent. In functional linguistics, it is defined as a unit of written texts delimited by graphological features such as upper-case letters and markers such as periods, question marks, and exclamation marks. This notion contrasts with a curve, which is delimited by phonologic features such as pitch and loudness and markers such as pauses; and with a clause, which is a sequence of words that represents some process going on throughout time. A sentence can include words grouped meaningfully to express a statement, question, exclamation, request, command, or suggestion.