constructivism noun. 
[kǝn'strʌktɪvɪz(ǝ)m] E20.[from CONSTRUCTIVE + -ISM, after Russian konstruktivizm.]1.  An orig. Russian artistic movement or style which makes use of three-dimensional, usu. non-representational, arrangements of different materials. 
E20.2.  Math. A view which admits as valid only constructive proofs and entities demonstrable by them. 
M20. ■   constructivist adjective & noun (a) noun an exponent or advocate of constructivism; 
(b) adjective of or pertaining to constructivism or constructivists: 
E20.  [TahlilGaran] English Dictionary ▲