useful life noun [C, usually sing.]

(Accounting )

the period of time that you can use an asset such as a machine or a vehicle before it is worth buying a new one to replace it:

This machinery has an estimated useful life of 80 000 running hours.

SYN ECONOMIC LIFE NOTE An asset is depreciated (reduced in value) over its useful life.

• WP
• wpm
• wrap
• wrapper
• wrapping
• wreck
• wreckage
• writ
• write
• write-back
• write-down
• write-off
• write-protect
• writer
• write-up
• writ of execution
• written-down value
• wrongdoing
• wrongful
• wt
• Wtd.
• WTO
• wunderkind
• WWD
• WWW