1. Lacking the ability to speak: This is the original and literal meaning of the word. It refers to someone who is unable to speak due to a disability.
2. Lacking intelligence or common sense: This is the more common, but also more offensive, meaning of the word. It's used to insult someone's intelligence, calling them stupid or foolish. This usage is generally considered rude and disrespectful.
3. Lacking in sound: This meaning is used to describe something that doesn't make a sound. For example, "The room was dumb with silence."
4. "Dumbbell" slang: In some contexts, "dumb" can be used as slang, often as a shortened version of "dumbbell." This implies someone is clumsy or foolish.
It's important to be aware of the context when using the word "dumb" to avoid causing offense.
Alternatives to "dumb":
* Unintelligent
* Ignorant
* Stupid (while also offensive, it is more direct than "dumb")
* Foolish
* Naive
* Unsophisticated
* Clueless
It's often best to avoid using any of these words altogether and try to rephrase your thought in a more respectful way.