Retrusive occlusion

What is Retrusive occlusion?

Retrusive occlusion definition and meaning on Dictionary terms:
a succession of musical sounds forming an air or melody, with or without the harmony accompanying it.
a musical setting of a hymn, poem, psalm, etc., usually in four-part harmony.

the state of being in the proper pitch: to be in tune.
agreement in pitch; unison; harmony.
proper adjustment, as of radio instruments or circuits with respect to frequency.
harmonious relationship; accord; agreement.
Archaic. frame of mind; mood.
Obsolete. a tone or sound.

verb (used with object), tuned, tun