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

(evolutionary theory, rare, sometimes humorous or derogatory) The selection of certain genes caused by the actions of humans, especially the intentional intervention in the breeding of plants or animals in order to preserve selected genetic traits; eugenics, selective breeding or culling.

(immunology) The process by which a specific antigen only activates its counter-specific lymphocyte, usually a B cell, so that particular cell is induced to produce many clones of itself for antibody production.

(ecology) A theory involving natural selection based on quality.

(ecology) A theory involving natural selection based on quantity.

plural of clonal selection

A form of natural selection in which extreme values for a trait are favored over intermediate values, causing subpopulations of a single species within the same habitat to develop different adaptations.

plural of selection rule

(US, basketball) The Sunday in March on which the teams that participate in the NCAA Division I men's basketball tournament are selected.

(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.