Product Quality Assurance

noun A noun is a word that represents a person, place, thing, or idea. In this case, 'untested' can also be used as a noun to refer to something that has not been tested.

adjective An adjective is a word that describes or modifies a noun or pronoun. In this case, 'untested' describes something that has not been tried or proven.

• The new medication is untested and requires further clinical trials.
• I wouldn't trust that untested product without more information.
• I'm not trying that untested stuff, who knows what it could do.
• His untested theory fell apart under closer scrutiny.

noun the length of time for which an item remains usable, fit for consumption, or saleable

• The shelf life of this medication is two years.
• Don't forget to check the shelf life of the milk before you buy it.
• I can't eat that, it's way past its shelf life.
• The shelf life of a trend in fashion can be very short-lived.