1.Belonging to the form, shape, frame, external appearance, or organization of a thing.
2.Belonging to the constitution of a thing, as distinguished from the matter composing it; having the power of making a thing what it is; constituent; essential; pertaining to or depending on the forms, so called, of the human intellect. "Of (the sounds represented by) letters, the material part is breath and voice; the formal is constituted by the motion and figure of the organs of speech."
3.Done in due form, or with solemnity; according to regular method; not incidental, sudden or irregular; express; as, he gave his formal consent. "His obscure funeral... No noble rite nor formal ostentation."
4.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. "A cold-looking, formal garden, cut into angles and rhomboids." "She took off the formal cap that confined her hair."
5.Having the form or appearance without the substance or essence; external; as, formal duty; formal worship; formal courtesy, etc.
6.Dependent in form; conventional. "Still in constraint your suffering sex remains, Or bound in formal or in real chains."
7.Sound; normal. (Obs.) "To make of him a formal man again."