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passive

Definition 1

Not actively participating in an activity by choice, such as a passive or sleeping partner.

Definition 2

Substance rendered inactive, inert, or unreactive through passivation.

Definition 3

Device (such as transponder) that only reflects a signal, or transmits a signal only upon receiving a command.

Definition 4

Component (such as a cable or pipe) or device (such as a heat exchanger or radiator) that has no moving parts and requires no energy input to perform its function.

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