Definition of "intervener" [in•ter•ven•er]

• One who intervenes. (noun)

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• "Unilateral intervention has historically been much better, but the intervener is always looked at with suspicion (see: Vietnam in Cambodia)."
• "The intervener is of the view that “[p] olice officers must engage young people during the explanation of their rights because people afflicted with learning disabilities use pseudo-sophisticated language, even when they do not understand the nature of what is being explained to them” [Factum atpara22]."
• "The ballot measure also allowed members of the public to challenge unnecessary premium hikes, a so-called intervener system similar to that in place in many public utility commissions."