1) Aligning a musical instrument to a standard pitch, or adjusting musical instruments for playing together. 2) Adjusting the equalisation of a sound system to suit the acoustic characteristics of a specific room and/or style of performance.
• (v. i.) To form one sound to another; to form accordant musical sounds. • (v. i.) To utter inarticulate harmony with the voice; to sing without pronouncing words; to hum. • (v. t.) To sing with melody or harmony. • (n.) A sound; a note; a tone. • (n.) A rhythmical, melodious, symmetrical series of tones for one voice or i... Found on http://thinkexist.com/dictionary/meaning/tune/