1. To beseech; to supplicate, to beg; to implore; to pray earnestly: Kneeling before the sacred stones, Mordred was obsecrating to the spirits for a good harvest.
2. Etymology: from Latin obsecratus, obsecrare, "to beseech, to entreat on religious grounds"; from ob-, "toward" and sacrare, "to make" or "to declare sacred"; from Latin sacer, "holy, sacred".