What is the opposite of informal?

Need antonyms for informal? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of having a relaxed, friendly, or unofficial style, manner, or nature
Adjective
Opposite of used in or suitable for everyday conversation rather than formal or official contexts
Adjective
Opposite of having or showing a casual attitude towards established form, custom, or rules
Adjective
Opposite of an absence of stress or worry
“Even inside, door locked and security system activated, she was tense.”
Adjective
Opposite of having a relaxed, friendly, or unofficial style, manner, or nature
“You will abide by my strict rules to maintain absolute cleanliness and hygiene in my household!”
Adjective
Opposite of pleasant and amicable in nature
“The two hot-headed professors had a hostile debate about the reality and effects of climate change.”
Adjective
Opposite of appearing relaxed, informal, and cheerily brisk
Adjective
Opposite of used in or suitable for everyday conversation rather than formal or official contexts
Adjective
Opposite of comfort based on one's experience and knowledge with their surroundings
“There was something eerie about the strange old Victorian mansion where they stayed for the night.”
Adjective
(of a place or setting) Opposite of having a personable or relaxed atmosphere
“The whole place was incredible, but it had an impersonal feel to it, almost like a hotel.”
Adjective
Opposite of friendly, good-natured, or easy to talk to
Adjective
Opposite of not labored or artificial
Adjective
Opposite of informal
Adjective
(of clothes) Opposite of providing a feeling of relaxation when worn
“I hope you realize you're going to be in that uncomfortable outfit for three hours.”
Adjective
(of a person) Opposite of easy to access, approach or talk to
“He made himself unapproachable and, in many ways, the kind of person people would avoid.”
Adjective
Opposite of folksy or friendly
Adjective
Opposite of suitable for or used on ordinary days
“While drifting down the river, it is not uncommon to see all types of wildlife like goats, deer, armadillos, foxes, and even a rare glimpse of a Bald Eagle.”
Adjective
Opposite of readily engaging in informal talk
Adjective
Opposite of done or acting in an indifferent or apathetic manner
“He displays a passionate disposition to saving endangered wildlife.”
Adjective
Opposite of natural, uncontrived or genuine in nature
“The loosely contrived apology wasn't even the tip of the iceberg.”
Adjective
Opposite of relaxed and unconcerned
“He became too overly concerned with trivial matters.”
Adjective
Opposite of not connected with one's work or official position
“The First Lady was presented with a gift during her official visit to the city.”
Adjective
Opposite of casual or relaxed in nature
“Around strangers, he would be restrained when expressing his true opinions so as not to offend anyone.”
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