one of the best known geysers of Yellowstone National Park.
Words That Are Older Than You ThinkThe first citation of "OMG" in the Oxford English Dictionary appears in a 1917 letter from the British admiral John Arbuthnot Fisher to Winston Churchill.
Origin of Old Faithful
so named because of the longevity and regularity of its activity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019