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 .
-
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.
"That was pretty hard to watch to be honest because they were in deep grief. And that will remain the case," he said.
From BBC ● Sep. 19, 2026
What’s left is in deep water: expensive, technically perilous and less likely to strike oil.
From The Wall Street Journal ● Sep. 12, 2026
Fiel, vice president of brand and creative at the AI-native startup Newton, loves reinventions of utilitarian clothing, favoring functional pieces in deep greens and blacks.
From Los Angeles Times ● Sep. 11, 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
Although frightened someone might still be hunting me, I fell fast asleep in deep peace, thanking God again.
From "March Forward, Girl" by Melba Pattillo Beals
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.
