Incommunicado is defined as not speaking or not having any interaction with others.
An example of incommunicado is someone not answering their phone and not leaving their house.
Without the means or right of communicating with others.
A prisoner held incommunicado; incommunicado political detainees.
Without a means of communicating.
In isolation or seclusion.
A prisoner held incommunicado, a celebrity living incommunicado.
Not willing to communicate with others.
Origin of incommunicado
From American Heritage Dictionary of the English Language, 5th Edition