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1. verb To confuse one thing for another. I'm sorry I'm late, I must have mixed up the time for our meeting.
2. verb To combine various substances by stirring. Have you mixed up the eggs and the butter yet?
3. verb To become involved in something. Don't get mixed up with a dangerous crowd like that.
4. verb To cause something to become jumbled or disorganized. My intern must have mixed up these papers—they're all out of order.
5. verb To increase the sound of one component in an audio file, such as a song. In this usage, a noun or pronoun can be used between "mix" and "up." I can barely hear the drums—can you mix them up?
6. adjective Confused. In this usage, the phrase is hyphenated before a noun. I'm still mixed up on this concept—can you explain it again?
7. adjective Drunk. In this usage, the phrase is hyphenated before a noun. Do you remember last night at the bar at all? You were really mixed up!
1. mod. confused; mentally troubled. (This is hyphenated before a nominal.) I was a little mixed up after the accident.
2. mod. alcohol intoxicated. I’m just a little mixed-up, nothing serious. No reason you should be swaying around like that.