for‧mal‧ize (also formalise British English) /ˈfɔːməlaɪz $ ˈfɔːr-/ verb [transitive]
[Word Family: noun: formality ≠ informality, formalization; verb: formalize; adverb: formally ≠ informally; adjective: formal ≠ informal]
to make a plan, decision, or idea official, especially by deciding and clearly describing all the details:
Final arrangements for the takeover have yet to be formalized.
—formalization /ˌfɔːməlaɪˈzeɪʃən $ ˌfɔːrmələ-/ noun [uncountable]

[TahlilGaran] Dictionary of Contemporary English ▲