first class

¹ American  

noun

1. the best, finest, or highest class, grade, or rank.

2. the most expensive and most luxurious class of accommodation on trains, ships, airplanes, etc.

3. (in the U.S. Postal Service) the class of mail consisting of letters, postal cards, or the like, together with all mailable matter sealed against inspection.

4. British University. the group receiving the highest distinction in an honors course.

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first-class ² American  

[furst-klas, -klahs] / ˈfɜrstˈklæs, -ˈklɑs /

adjective

1. of the highest or best class or quality.

   a first-class movie.

2. best-equipped and most expensive.

   a first-class railroad car.

3. given or entitled to preferred treatment, handling, etc..

   first-class mail.

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adverb

1. by first-class conveyance.

   to travel first-class.

first class British  

noun

1. the class or grade of the best or highest value, quality, etc

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adjective

1. of the best or highest class or grade

   a first-class citizen

2. excellent; first-rate

3. of or denoting the most comfortable and expensive class of accommodation in a hotel, aircraft, train, etc

4. 1. (in Britain) of or relating to mail that is processed most quickly

   2. (in the US and Canada) of or relating to mail that consists mainly of written letters, cards, etc

5. education See first

adverb

1. by first-class mail, means of transportation, etc

Etymology

Origin of first class¹

First recorded in 1740–50

Origin of first-class²

First recorded in 1780–90

Example Sentences

After launching with fanfare, Iowa’s Center for Intellectual Freedom postponed its first classes last month, in part due to low enrollment; those classes have been delayed until spring.

From The Wall Street Journal

He never rose beyond private first class during a 1950s stint in the military, but he projected so much machismo that he seemed born to wear an officer’s uniform.

From The Wall Street Journal

There is another picture with a tray of mail placed at the front, which he explains was first class mail which is to supposedly to be delivered first.

From BBC

United Airlines helped re-route Calderón to Nicaragua — and the airline did bump up his seat to first class to make up for the mix-up.

From Los Angeles Times

“Is there a range from economy to first class, Toyota to Rolls-Royce? Yes,” he says.

From The Wall Street Journal