To obtain (a pet) from a shelter or the wild.
To take voluntarily (a child of other parents) to be in the place of, or as, one's own child.
To take or receive as one's own what is not so naturally.
To take by choice into the scope of one's responsibility.
To select and take or approve.
To beat an opponent ten times in a row.
To acclimatize an animal or plant.
To make (a word) a natural part of the language, using the native homologue of each phoneme (and often for each morpheme) of the imported word (e.g., native inflections).
To study nature.
To limit explanations of a phenomenon to naturalistic ones and exclude supernatural ones.
To grant citizenship to someone not born a citizen.
To make natural