1. Utterly quiet: lacking any noise or sound.
2. Not speaking or communicating at a particular time; especially, by choice.
3. Saying very little; not inclined to say much; such as, "the strong silent type".
4. Communicated without words or sound: "She rolled her eyes in silent disbelief."
5. Currently inactive or not operating; such as, a silent volcano.
6. A description of a letter that appears in a word but is not pronounced; for example, the k in "knight".
7. A reference to movies made without sound; especially, those made before 1927.
8. Not allowed to speak because of a religious vow of silence; a silent order of monks.

This term covers all business solutions enabled by tagging, tracking, sensing and other technologies, including RFID, which make everyday objects intelligent and interactive: When combined with continuous and pervasive internet connectivity, silent commerce forms a new infrastructure that enables companies to collect data and deliver services without human interaction.

Myocardial infarction occurring without pain or other symptoms; often detected only by electrographic or postmortem examination.

An actual infarction of the myocardium, but with none of the signs or symptoms of this condition.