(general) The state of being dominant; supremacy; for example in plants, apical dominance refers to the condition in which vertical growth supersedes lateral growth.
(genetics) The property of a gene (or allele) when it suppresses the expression, or dominates the effects, of the recessive gene (or allele).
(ecology) (A group of) organisms that have acquired a high status in a social group, such as an animal or a group of animals on top of a social hierarchy usually as a result of aggression.
(neurology) The normal tendency for one side of the body or of one of a pair of organs to dominate or be used in consistent preference than the other, e.g. lateral dominance refers to the consistent use of one side of the body, as in being left-handed or right-handed, and left-brained or right-brained (depending on which side of his brain is dominant or frequently used).
Word origin: Latin dominari, to govern.
Related forms: dominant (adjective or noun), dominate (verb).
Related terms: apical dominance, codominance, complete dominance, incomplete dominance.