1. A unit of language: This is the most basic definition. A word is a single unit of meaning, typically made up of one or more sounds or symbols. It represents a concept, object, action, or attribute.
2. A written or spoken expression: This definition encompasses the written form of a word as well as the spoken sound. It can include phrases or sentences, as long as they convey a specific meaning.
3. A promise or guarantee: In this context, "word" refers to a spoken commitment or assurance. For example, "I give you my word that I will be there."
4. A message or news: "Word" can also mean information or news, often spread by word of mouth.
5. A command or instruction: Sometimes, "word" is used to mean a command or instruction, especially in a military context. For example, "The officer gave the word to advance."
6. A synonym for "speak" or "say": In certain cases, "word" can be used as a verb, meaning to speak or say something.
The precise definition of "word" will depend on the context in which it is used.
Do you have a specific context in mind? If you could provide more information, I could give you a more precise definition.