What is the definition of word

Word, an individual lexical unit of a language that may consist of one or more morphemes. Words can function as nouns, verbs, adjectives, and adverbs. The smallest unit of a language that can stand on its own and mean something. It can be single or multisyllabic and can consist of one or more letters. Words are used to express ideas, feelings, and information in a variety of ways, such as speech, writing, and sign language.