1. verb To adjust a musical instrument to achieve the correct or desired pitch or key. A noun or pronoun can be used between "tune" and "up." I love hearing the musicians tune up in the orchestra pit before the performance. You should tune the piano up next week so we can play it during the party.
2. verb To adjust a piece of machinery or equipment to make it work properly or efficiently. A noun or pronoun can be used between "tune" and "up." You'll need to tune the car up before you take it to be inspected this weekend. Make sure you tune up the equipment at least once a month, or it can mess up the production line.
3. noun An adjustment to a piece of machinery or equipment to make it work properly or efficiently. As a noun, the phrase is usually hyphenated. The car needs a tune-up before our trip. It's working well overall, it just has a few parts that need a tweak—nothing a quick tune-up can't fix.
slang Drunk. Primarily heard in US. We were all pretty tuned up by the time we left the bar. They spend each Friday night getting tuned up on cheap beer and whiskey.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.