APA Dictionary of Psychology

n. a reproductive strategy that involves a high degree of parental investment in a relatively small number of offspring over an individual’s reproductive life, as in human beings and other primates. Populations of K-strategists expand to the maximum size that the habitat can support (its carrying capacity, or K). K-strategy implies that a constant, relatively small number of high-quality offspring is more likely to lead to reproductive success than producing offspring at the maximum rate possible (see r-strategy).