stand-by


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Related to stand-by: Stand-By Agreement

stand-by

(of an airline passenger, fare, or seat) not booked in advance but awaiting or subject to availability
References in periodicals archive ?
The Energy Saving Trust said phasing out stand-by would be a positive step for consumers in the long term.
A spokeswoman said: "Households in the UK now spend about 10 per cent of their electricity bill on stand-by power and the average household wastes pounds 37 each year by leaving appliances on stand-by."