A word is a unit of language that carries meaning. Words are the building blocks we use to communicate ideas, feelings, and information. When you speak or write, you string words together into sentences that express what you're thinking.

Some words name things: dog, happiness, mountain. Others describe actions: run, think, create. Still others connect ideas or show relationships: because, through, although. English has hundreds of thousands of words, but most people use only a few thousand in everyday conversation.

Words gain their power from shared understanding. When you say “bicycle,” others picture the same basic thing you do. That agreement makes communication possible. New words enter the language constantly as people invent things, discover concepts, or borrow terms from other languages. Words like internet, emoji, and podcast didn't exist a few generations ago.

A word can also mean a promise or guarantee, as in “I give you my word.” When someone keeps their word, they do what they said they would do. Breaking your word means failing to follow through on a promise.

The phrase “word for word” means exactly, without changing anything. If you memorize a poem word for word, you know it precisely as written.