Requirement
WordNet
noun
(1) Something that is required in advance
"Latin was a prerequisite for admission"
(2) Required activity
"The requirements of his work affected his health"
"There were many demands on his time"
(3) Anything indispensable
"Food and shelter are necessities of life"
"The essentials of the good life"
"Allow farmers to buy their requirements under favorable conditions"
"A place where the requisites of water fuel and fodder can be obtained"
WiktionaryText
Noun
- A necessity or prerequisite; something required or obligatory.
- Something asked.
- (engineering) A statement (in domain specific terms) which specifies a verifiable constraint on an implementation that it shall undeniably meet or (a) be deemed unacceptable, or (b) result in implementation failure, or (c) result in system failure.