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- pronunciation:
- feIl
seIf
- parts of speech:
- adjective, noun
| part of speech: |
adjective |
| definition 1: |
protected against failure or breakdown, as by a compensatory or back-up mechanism that begins to function automatically in an emergency.
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| definition 2: |
of, pertaining to, or designating a system of military controls or precautions designed to activate and guide a response to an attack, esp. by air.
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| definition 3: |
having no chance of failing; infallible.
a fail-safe plan |
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| part of speech: |
noun |
| definition 1: |
a mechanism that protects against or warns of failure in a device or system.
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| definition 2: |
a point at which a military operation, esp. a bomber attack or counterattack, must halt pending further instruction.
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