requirement as in required activity

• "the requirements of his work affected his health"
• "there were many demands on his time"

Synonyms

• demandan urgent or peremptory request; the ability and desire to purchase goods and services; required activity; the act of demanding; a condition requiring relief; request urgently and forcefully; require as useful, just, or proper; claim as due or just; lay legal claim to ; summon to court ; ask to be informed of

requirement as in 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"

Synonyms

• necessitythe condition of being essential or indispensable ; anything indispensable
• essentialanything indispensable; absolutely necessary; basic and fundamental; of the greatest importance; being or relating to or containing the essence of a plant etc; defining rights and duties as opposed to giving the rules by which rights and duties are established
• requisitenecessary for relief or supply; anything indispensable
• necessaryabsolutely essential ; unavoidably determined by prior circumstances; anything indispensable

requirement as in something that is required in advance

• "Latin was a prerequisite for admission"

Synonyms

• prerequisiterequired as a prior condition or course of study ; something that is required in advance