noun Download 🔗Share (common law) A legal principle in the law of equity that prevents a party from asserting otherwise valid legal rights against another party because of conduct by the first party, or circumstances to which the first party has knowingly contributed, make it unjust for those rights to be asserted. Examples : "Because the store owner told customers for months they could return items with no receipt, estoppel prevents him from suddenly requiring receipts now. " law right doctrine state property business finance insurance asset Chat with AIVocabulary GamePractice Reading