Old Faithful

noun

1. one of the best known geysers of Yellowstone National Park.

Word History and Origins

Origin of Old Faithful¹

So named because of the longevity and regularity of its activity

Example Sentences

The 60-year-old woman was injured Monday while walking off trail near Mallard Lake Trailhead and the iconic Old Faithful geyser, park officials said.

Read more on Los Angeles Times

I’m hoping the rocks will keep Old Faithful under control until I can purchase a pump that only moves about 100 gallons per hour.

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The service closed the area, a few miles from the Old Faithful geyser.

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A violent hydrothermal explosion at Yellowstone National Park sent visitors fleeing Tuesday as mud and debris erupted from a geyser just north of Old Faithful, according to park rangers.

Read more on Los Angeles Times

It was all as surprising as Old Faithful.

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Related Words

• committed 
• devoted 
• enthusiastic 
• faithful 
• zealous