harmonic 

1. pertaining to harmony, as distinguished from melody and rhythm.
2. marked by harmony; in harmony; concordant; consonant.
3. Physics. of, pertaining to, or noting a series of oscillations in which each oscillation has a frequency that is an integral multiple of the same basic frequency.
4. Mathematics.
a. (of a set of values) related in a manner analogous to the frequencies of tones that are consonant.
b. capable of being represented by sine and cosine functions.
c. (of a function) satisfying the Laplace equation.

1.) I'll play the melody, you play the harmony.
2.) You need to take a vacation and get HARMONIC with your life.
3.) (self-explanatory)
4.) (self-explanatory)

harmonic by Braimp December 12, 2006

Harmonic Minor 

The best fucking guitar scale!

Dude, I learned Harmonic Minor, now I can play Slayer shit and some Pantera! Fuckin sick !

Harmonic Minor by I’m going to play guitardrums January 24, 2019

harmonic sex 

It's where you stick a twig up your dick-hole

Harmonic sex is hilarious

harmonic sex by Dick pocket March 5, 2017

harmonic hypnosis

Psychological effect that results from listening to the same piece of audio for a long period of time. Small changes in pitch and inflection become unnoticeable, which creates the auditory illusion that the sound is near perfect or flawless in pitch. This effect is extremely common in sound engineering and music production.

"Hey man, listen to this mix."
"That sounds way off. Is it even in the same key?"
"Yeah I must've gotten a little harmonic hypnosis after editing all night."

harmonic hypnosis by jimihendrixx July 4, 2018

Harmonic Distortion 

fart

Did you just make a harmonic distortion?

Harmonic Distortion by California Genius December 7, 2010

harmonic-depressive

A bi-polar individual, or culture, hopelessly out of tune with itself.

In the grip of a pandemic with no cure, economic collapse, race riots, a virtual civil war between the reds and the blues, he felt America in the spring of 2020 descending into an harmonic-depressive state.

harmonic-depressive by Monkey's Dad May 30, 2020

Harmonic Visions 

Whilst withdrawing from large amounts of alcohol, the eyes can sometimes see white threads floating about which flow in a seemingly "musical pattern".

After drinking large quanity's of alcohol and returning to sobriety, the eyes can play tricks on you.. causing white lines which move rythmically. These are called "Harmonic Visions".

Harmonic Visions by Joan Of Arkiagerrr June 8, 2009