maximalist noun & adjective. 
['maksɪm(ǝ)lɪst] Also 
Maximalist. 
E20.[from MAXIMAL + -IST, after Russian maksimalist. Cf. BOLSHEVIK.]A. noun. A person who holds out for the maximum of his or her demands and rejects compromises; 
spec. (
Hist.) a member of the part of the Russian Social-Democratic Party which favoured extreme methods; a member of any similar group outside the former USSR. 
E20.b.  attrib. or as
 adjective. Of, pertaining to, or characteristic of maximalists or maximalism. 
M20. ■   maximalism noun the beliefs or practices of maximalists 
E20.  [TahlilGaran] English Dictionary ▲