verb
(transitive) To enhance.
(transitive) To make (someone or something) rich or richer. [from 14th c.]
(transitive) To adorn, ornate more richly. [from 17th c.]
(transitive) To add nutrients or fertilizer to the soil; to fertilize. [from 17th c.]
(physics, transitive) To increase the amount of one isotope in a mixture of isotopes, especially in a nuclear fuel. [from 20th c.]
(transitive) To add nutrients to foodstuffs; to fortify.
(chemistry) To make to rise the proportion of a given constituent.