n.  1.  The least quantity assignable, admissible, or possible, in a given case; hence, a thing of small consequence;  opposed to

Noun  1.  minimum  the smallest possible quantity Synonyms: lower limit Antonyms: maximum, upper limit  the largest possible quantity 
2.  minimum  the point on a curve where the tangent changes from negative on the left to positive on the right Antonyms: maximum  the point on a curve where the tangent changes from positive on the left to negative on the right  
Adj.  1.  minimum  the least possible; "needed to enforce minimal standards"; "her grades were minimal"; "minimum wage"; "a minimal charge for the service" Synonyms: minimal 