Formal
/ˈfɔːməl/
noun
Formalin.
An evening gown.
An event with a formal dress code.
“Jenny took Sam to her Year 12 formal.”
adjective
Being in accord with established forms.
“She spoke formal English, without any dialect.”
Official.
“I'd like to make a formal complaint.”
Relating to the form or structure of something.
“Formal linguistics ignores the vocabulary of languages and focuses solely on their grammar.”