har ‧ mo ‧ nize BrE AmE ( also harmonise British English ) /ˈhɑːmənaɪz $ ˈhɑːr-/ verb
1 . [intransitive] if two or more things harmonize, they work well together or look good together
harmonize with
The new offices harmonize with the other buildings in the area.
2 . [transitive] to make two or more sets of rules, taxes etc the same:
the proposal to harmonize tax levels throughout the EU
3 . [intransitive] to sing or play music in ↑ harmony