in deep
Idioms-
Seriously involved; far advanced. For example, He was in deep with the other merchants and couldn't strike out on his own , or She used her credit cards for everything, and before long she was in deep .
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in deep water . Also, in over one's head . In trouble, with more difficulties than one can manage, as in The business was in deep water after the president resigned , or I'm afraid Bill got in over his head . These metaphoric expressions transfer the difficulties of being submerged to other problems. The first appears in Miles Coverdale's 1535 translation of the Book of Psalms (68:13): “I am come into deep waters.” The second, which also can signify being involved with more than one can understand, dates from the 1600s. Also see over one's head .
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Their size varies dramatically, from less than a centimeter long to more than 70 cm in Antarctica, where some species hunt smaller animals in deep ocean environments.
From Science Daily ● Sep. 25, 2026
If you lie dead still and your pulse plummets, the algorithm might assume you’re in deep sleep—a reasonable deduction, but still a guess.
From The Wall Street Journal ● Sep. 6, 2026
“If you’re Loomered, you’re in deep trouble. That’s the end of your career, in a sense.”
From Salon ● Sep. 3, 2026
Every morning, he engages in deep stretching exercises.
From Los Angeles Times ● Aug. 11, 2026
The room is outfitted in deep reds and oranges like a phoenix's feathers.
From "The Belles" by Dhonielle Clayton
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
