Meaning of FORMAL in English
( a. )
Devoted to, or done in accordance with, forms or rules; punctilious; regular; orderly; methodical; of a prescribed form; exact; prim; stiff; ceremonious; as, a man formal in his dress, his gait, his conversation.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012