(biology) The characteristic of an organism that enables it to survive and reproduce better than other organisms in a population in a given environment; the basis for evolution by natural selection.

(clinical psychology, psychiatry) A severe form of social anxiety disorder characterized by a total inability to speak or communicate orally in certain social settings. The inability to speak is involuntary and persistent, and is not caused by a communication disorder, neurodevelopmental disorder, psychotic disorder, or intellectual disability.

Selecting oneself for something. / Selecting something for oneself. / (countable) An item selected by oneself.

The practice of breeding the best specimens of a given organism to encourage certain features.

plural of selection rule

A standardized colour for automotive lamps, intended to improve vision by removing blue wavelengths from the projected light.

(economics, business, insurance) The process by which the price and quantity of goods or services in a given market is altered due to one party having information that the other party cannot have at reasonable cost.

plural of self-selection

(evolutionary theory) A type of natural selection where members of the sexes acquire distinct forms either because the members of one sex choose mates with particular features or because in the competition for mates among the members of one sex only those with certain traits succeed.

(evolutionary theory) A process by which heritable traits conferring survival and reproductive advantage to individuals, or related individuals, tend to be passed on to succeeding generations and become more frequent in a population, whereas other less favourable traits tend to become eliminated; the differential survival and reproduction of phenotypes.