Definition from Wiktionary, the free dictionary
- 1980 - Stephen Donaldson, The Wounded Land, page 162, The memory came upon him like a geas, overwhelming his revulsion, numbing his heart.
Neil Gaiman, "Chivalry": "Galaad stood up again and turned to Mrs. Whitaker. 'Gracious lady, keeper of the Holy of Holies, let me now depart this place with the Blessed Chalice, that my journeyings may be ended and my geas fulfilled.'"
- Alternative form of