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1. To move slowly away from someone or something, especially while propelled by wind or water. I held the feather in my palm until it drifted off into the air.
2. To gradually fall sleep. I really do want to watch this movie with you, but I'm so tired that I keep drifting off.
3. To lose interest and stop paying attention to someone or something. I think you need to add some humor to this speech so that your audience doesn't drift off while you're talking.
4. To slowly leave one place or thing to go to another. We all had a hard time saying good-bye to each other, but eventually we all drifted off to our cars.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
to move slowly away. The boat slowly drifted off and was gone. The clouds drifted off and the sun came out.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
1. To move away slowly, especially while being carried by currents of air or water: The stick drifted off with the river current. The child let go of the balloon and it drifted off toward the horizon.
2. To walk slowly toward some other place or area: As they left the cafeteria, the students started drifting off toward the gym.
3. To fall asleep gradually: I drifted off while watching television. I was so tired that I drifted off.
4. To stop listening or paying attention to someone or something: The professor noted that most of the students had drifted off during the lecture.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.