adj. In a state or condition in which one is unable or unwilling to communicate.
ad. In a manner in which communication with outsiders is not possible, for either voluntary or involuntary reasons, especially due to confinement or reclusiveness.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. without the means or right to communicate
Word Usage
"In Uganda, for example, we have documented long-term incommunicado detention, torture and, in some cases, deaths of alleged treason and terrorism suspects at the hands of the government's Joint Anti-Terrorism Task Force."