Word is a basic unit of language consisting of one or more spoken sounds, written symbols, or both, that can have a meaning or perform a grammatical function. Words can be combined to form phrases, sentences, and larger units of language.
Words may belong to different parts of speech, such as nouns, verbs, adjectives, adverbs, pronouns, determiners, and prepositions. The definition and boundaries of a word can vary between languages and systems of writing.