1. informal
Women's Liberation is a broad-based but informal popular movement.
Today's party is informal.
The school uniform is convenient because it can be worn for both informal and formal occasions.
My American classes are more informal.
informal conversation
Informal diction is always full of mystery and surrealism.
This implies a fun and relaxed working atmosphere where team achievement is highly valued, communication is extremely important and traditional 3-hour meetings have been replaced by informal chats in the queue for coffee.
Don't be afraid to show yourself through speech and take every opportunity to speak to others in English and soon you will feel right at home in informal conversational situations.
Japanese speakers of English often have difficulty in dealing with informal conversation, such as at parties or in small informal groups.
In those days, or at any rate in Cambridge, laboratory life was rather informal.
small talk is what we call a polite and informal conversation about things which aren't really important or meaningful when meeting people socially
"One example of this is the 'informal' labour market for women. "
Our motorbike club is informal.
"Hi" is an informal way of saying hello.
Once you have reached informal agreement, you should enter into a contract with the other party.
2. official
This news is official.
The official could not deal with the complaint himself.
His official title is Director-General of the Environment Agency.
A customs official asked me to open my suitcase.
As a public official you have sworn an oath to uphold and defend the constitution.
In the official question collection it is explained as being "passive voice of the present continuous tense".
Maori culture is now spreading more and more among us and their language has become an official language.
2002: President Bush signs the Homeland Security Act and it becomes an official Cabinet agency.
The official informed Bob that his request for a parking permit had been rejected.
He made an official visit to the French president the day before yesterday.
Up to this point has been the official story, which Kirika also knows. "By which you mean there is also an unofficial?"
Many websites prohibit misleading usernames that imply an official role on the website such as "admin," "administrator," "webmaster," "system operator," "sysop," or "moderator."
You need to have strong character to succeed as official.
The official designs of the Government, especially its designs in connection with postage stamps and coinage, may be described, I think, as the silent ambassadors of national taste.
The European Union has 23 official languages, theoretically with the same rights, but in practice only 3 working languages: English, French and German.
3. officially
The war was officially over.
Officially it is his responsibility, but in fact his secretary does all the work.
The Japanese Parliament today officially elected Ryoutarou Hashimoto as the country's 52nd prime minister.
He officially announced himself as a candidate.
He was never officially charged with spying.
Who officially represents a limited company?
Let us suppose that the number of incidents is twice that of those officially recorded.
4. formal
The school uniform is convenient because it can be worn for both informal and formal occasions.
They exchanged formal greetings.
Do we dress formal?
His language is very formal.
Her clothes were out of place at a formal party.
He was a tall, heavy-looking young man of five-and-twenty. His air was grave and stately, and his manners were very formal.
Boy, did she have egg on her face when she showed up at the formal party wearing blue jeans!
I will send our formal agreement to you.
She kept conversation on a formal plane.
Formal dress must be worn.
How formal is this ceremony?
Formal declarations of war haven't been America's style since 1942.
Some cultures and situations are formal, which means that we have to follow rules, other cultures and situations are more informal.
Gift-giving is quite formal in some countries.
Whenever I translate something from English into Spanish, I prefer to use the familiar "tú" instead of the formal "usted".
5. formally
I don't believe we've been formally introduced.
He isn't formally hired yet, but it's certain he will get the job.