Entry 1 sense Webster, 1913 Inlaw /ĭnˌ-lô'/ · In·law · IPA /ɪnˈlɔː/ 01 v. t. To clear of outlawry or attainder; to place under the protection of the law. 1. To clear of outlawry or attainder; to place under the protection of the law.(Old Eng. Law)