A sentence is an expression in natural language, and often defined to indicate a grammatical structure unit consisting of one or more words that generally bear minimal syntactic relation to the words that precede or follow it. A sentence can include words grouped meaningfully to express a statement, question, exclamation, request or command. So, a sentence is a group of words that contains a subject and a verb and expresses a complete thought.
Reference by : https://englishahkam.blogspot.com/2011/08/sentence.html
Amini Rahmawati (Aminion) 