تعريف old faithful في الإنجليزية الإنجليزية القاموس.
A geyser in the American national park of Yellowstone, known for its regular eruptions
A geyser in Yellowstone National Park in northwest Wyoming. Its eruptions, which last about 4 minutes, occur on the average of once every 65 minutes (the intervals can vary from 33 to 90 minutes). The geyser sends up a column of hot water and steam ranging from 35.4 to 53.4 m (116 to 175 ft) high. a large geyser in Yellowstone National Park in the northwestern US, which sends a stream of hot water high up into the air about once every hour
a geyser in Yellowstone National Park that erupts for about 4 minutes about every 65 minutes