Entry 1 sense Webster, 1913 Invaluable /ĭnˌ-văl'-yəb-əl/ · In·val·u·a·ble · IPA /ɪnˈvælju(ə)bl̩/ 01 a. Valuable beyond estimation; inestimable; priceless; precious. 1. Valuable beyond estimation; inestimable; priceless; precious.