Definition of “first class” - English Dictionary

“first class” in British English

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first classadjective

also first-class uk /ˌfɜːst ˈklɑːs/ us /ˌfɝːst ˈklæs/

first class adjective (QUALIFICATION)

used to refer to the best possible undergraduate university degree you can get in the UK and some other countries

first class adjective (MOST EXPENSIVE)

relating to the most expensive and highest quality service on a plane or train, or in a hotel:

a first-class ticket
first-class accommodation/travel

relating to the service for sending post that people usually use:

first-class mail/postage
How much is a first-class stamp?

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first classadverb

uk /ˌfɜːst ˈklɑːs/ us /ˌfɝːst ˈklæs/

If you travel first class in a train, aircraft, etc., you use the best and most expensive type of service:

She always travels first class.

UK If you send something first class, you send it by the usual post service:

How much more would it cost to send it first class?

first classnoun [ U ]

uk /ˌfɜːst ˈklɑːs/ us /ˌfɝːst ˈklæs/

the best and most expensive seats on a plane or in a train:

Because of the delay, we were offered seats in first class.

UK the post service that most people use for sending letters, etc.:

First class costs more, but it will arrive tomorrow.

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(Definition of “first class” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“first class” in American English

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first classnoun [ U ]

/ˈfɜrst ˈklæs/

the best group or class, esp. the most expensive seats on a plane or a train:

I upgraded my plane ticket to first class from tourist class.

first-classadjective

/ˈfɜrstˈklæs/

first-class adjective (QUALITY)

of the highest quality or standard:

a first-class education

first-class adjective (MAIL)

of or having to do with the standard way of mailing letters and cards:

The price of a first-class stamp has gone up again.

(Definition of “first class” from the Cambridge Academic Content Dictionary © Cambridge University Press)

“first class” in Business English

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first classadjective

uk us

of excellent quality:

The work that she did on the project was first class.
He really is pre-eminent in the field and has built up a first-class business.

TRANSPORT relating to the highest level of service offered on a plane, train, etc.:

a first-class cabin/fare/seat, etc.

in the UK, relating to the fastest service for sending mail:

It is welcome news that first-class delivery has improved.
The cost of a first-class stamp is going up.

in the US, relating to the service used for sending letters, cards, and small packages:

He predicts first-class volume will decline by 20 percent by the year 2017 as fewer people sit down to write a letter.
Experts expect that the U.S. Postal Service soon will request a price increase for first-class letters.

used to describe the best possible degree you can get from a university in the UK:

A report showed that a first-class degree is worth, on average, 12% more in likely future earnings.

first classadverb

uk us

TRANSPORT using the highest level of service offered:

fly/travel first class I fly business class; I don't fly first class.

using the fastest service for sending mail:

The minimum requirement is that certificates must be sent first class to the shareholder's registered address.

first classnoun [ U ]

uk us

the best seats, service, etc. on a plane, train, etc.:

I didn't see him on the flight because he was in first class.

in the UK, the fastest service for sending mail:

Always use first class for sending these documents.

in the US, the service for sending letters, cards and small packages

(Definition of “first class” from the Cambridge Business English Dictionary © Cambridge University Press)