- 1(formal) not as important as the main aim, part, etc. of something peripheral information matters of peripheral concern peripheral to something Fund-raising is peripheral to their main activities.
- 2(technology) connected with the outer edge of a particular area the peripheral nervous system peripheral vision
- 3(computing) (of equipment) connected to a computer a peripheral device
adverb They were only peripherally involved in the affair.See peripheral in the Oxford Advanced Learner's Dictionary
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