formal
/ˈfɔːrməl/Definitions
1. adjective
having a serious and respectable character; conventional or traditional
“The formal attire was required for the wedding ceremony.”
2. noun
a document or a deed that is formally drawn up and authenticated, especially one that is official or of great importance
“The formal is a copy of the contract signed by both parties.”
3. verb
to give a formal or official status to something
“The new policy was formally adopted by the company.”
4. adverb
in a formal manner; formally
“The ambassador spoke formally at the diplomatic gathering.”