Find Antonyms

formally Antonyms

Opposite of formally

Because the opposite of formally shifts with each meaning, the 9 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
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• adverb (Context 1)

In an official, authorized, or publicly recognized manner, in accordance with established rules or legal procedures.

Usage Example

"The treaty was informally ratified by both parliaments after months of negotiation."

Strongest
informally
unofficially
Strong
off the record
privately

• adverb (Context 2)

In a polite, dignified, or conventional manner that strictly observes social etiquette, dress codes, or decorum.

Usage Example

"All guests are expected to dress informally for the charity gala this evening."

Strongest
informally
casually
Strong
colloquially
familiarly

• adverb (Context 3)

With respect to outward structure, logical form, or theoretical arrangement rather than practical content, or through structured instruction.

Usage Example

"Although she was never informally trained in classical music, she became an accomplished pianist."

Strongest
informally
Strong
intuitively
practically

Similar words to formally

Words similar to formally shift depending on context. Common synonyms include:

officially
ceremoniously
theoretically
conventionally
structurally
properly
legally
decorously
See all synonyms of formally

• Nearby Words

formaldehyde
formality
formalize
formally
formalness
format
formation

Cite this Entry

Wordmom. (2026). Antonyms for Formally. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/formally
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