any of various plants, especially of the genera Ipomoea and Convolvulus, as I. purpurea, a twining plant having cordate leaves and funnel-shaped flowers of various colors, often opening only in the morning.
a racehorse that runs faster in morning workouts than in afternoon races.
An Americanism dating back to 1805–15
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In the morning glory populations, those traits became increasingly linked.
From Science Daily ● Sep. 4, 2026
Cobaea, or any morning glory or nasturtium relative, is sown in May in the greenhouse or under lights.
From Seattle Times ● Jan. 17, 2024
Over a morning glory bowl, dandy latte and grapefruit juice, skateboarder and model Briana King tells me she’s “been thinking a lot less.”
From Los Angeles Times ● Sep. 14, 2022
"Bill, you beautiful specimen of a man," gushed James Corden, "For so much of my life, you were my morning glory and I will miss waking up with you every day."
From BBC ● Sep. 1, 2022
The blossoms on the morning glory vine were little tight blue fists, and you could hear husky sighing from the cornfield across the fence.
From "A Long Way from Chicago" by Richard Peck
The analysis showed average air temperatures below 66 or above 77 degrees Fahrenheit made fomesafen, glyphosate, and mesotrione -- representing three herbicide sites of action -- less effective on waterhemp, giant foxtail, and morning-glory species.
From Science Daily ● Nov. 19, 2024
It’s lovely in its way, with a mass of morning-glory vines softening things up, and, in lieu of actual trees, a mural of woodland scenes painted along the outside wall.
From The New Yorker ● Jun. 28, 2010
So thick were the morning-glory vines on some of the islets that the scientists had to hack their way through with machetes.
From Time Magazine Archive
The rate of expenditure is climbing like a morning-glory in a hot dawn.
From Time Magazine Archive
First we passed through a swamp of purple and white azaleas; then one of snowy callas; then near a bank hidden from view by heavy morning-glory vines in bloom, still dripping with dew.
From Scenes in the Hawaiian Islands and California by Mary E. (Mary Evarts) Anderson
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
