1 the act or an instance of selecting; the state of being selected.
2 a selected person or thing.
3 things from which a choice may be made.
4 Biol. the process in which environmental and genetic influences determine which types of organism thrive better than others, regarded as a factor in evolution.
Derivatives:
selectional adj. selectionally adv.
Etymology: L selectio (as SELECT)
Useful english dictionary. 2012.