selective /səˈlɛktɪv/ adjective5 •Of or relating to the process of selection.The selective algorithm excludes the redundant classifiers to construct a streamlined ensemble learning. — 2016 •Of or relating to natural selection. •Of or relating to the social work approach called selectivity.Eligibility criteria form the essence of selective programs and individuals are evaluated using a means test. — 2006 •Choosy, fussy or discriminating when selecting.He's very selective and spent hours in the store choosing a new shirt. •(US) Having the authority or capability to make a selection.In the USA, military conscription is controlled by the Selective Service. formsmore selective · most selective