long. Meaning in the Cambridge English Dictionary
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Meaning of “long.” in the English Dictionary

"long." in British English

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long.noun [U]

written abbreviation for longitude

longadjective

uk   /lɒŋ/  us   /lɑːŋ/

long. adjective (TIME)

A1 continuing for a ​largeamount of ​time: a long ​film/​meeting I've been ​waiting a long time. It's a long ​time since I ​worked there. Apparently the ​sessions are an ​hour long.
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long. adjective (DISTANCE)

A1 being a ​distance between two ​points that is more than ​average or ​usual: long ​hair long ​legs a long ​dress There was a long ​queue at the ​postoffice. We're still a long way from the ​station.
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long. adjective (MANY WORDS)

A2 used to ​describe a ​piece of writing that has a lot of ​pages or words: a long ​letter/​book/​report
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longadverb

uk   /lɒŋ/  us   /lɑːŋ/

long. adverb (TIME)

A2 used to ​mean "(for) a long ​time", ​especially in ​questions and ​negativesentences: Have you been ​waiting (for) long? I'm just writing a ​letter but it won't take long. How long have you been in ​England? Don't ​rush - take as long as you like. We've been ​walking all ​day long. I've ​known her longer than you have. I won't be ​staying much longer.C2 a long ​period of ​time before or after something: She ​left the ​house long before I ​arrived. It wasn't long before he was back with his ​family. He did not ​join them until long after they had ​eaten. used with the past ​participle or the -ingform of the ​verb to ​mean that a ​state or ​activity has ​continued for a long ​time: a ​long-awaitedletter long-serving ​employees
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long. adverb (IF)

as/so long as
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B1 used to say that something must ​happen before something ​else can ​happen: I can come as long as I can ​leave by 4.00. Bring ​yourfriends by all ​means - just so long as I ​know how many are coming.
Grammar

longverb

uk   /lɒŋ/  us   /lɑːŋ/ formal

longnoun

uk   /lɒŋ/  us   /lɑːŋ/
(Definition of long. from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"long" in American English

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longadjective [-er/-est only]

 us   /lɔŋ/

long adjective [-er/-est only] (DISTANCE)

being a ​distance between two ​points that is more than ​average or ​usual, or being of a ​particularlength: There was a long ​line at the ​postoffice. When I was ​young I ​wore my ​hair long. We’re still a long way from the ​station (= a ​greatdistance). A long ​piece of writing, such as a ​book or ​story, has many words: It’s a long ​book – over 600 ​pages.Long underwear Long ​underwear is long johns .

long adjective [-er/-est only] (TIME)

being an ​amount of ​time that is more than ​average or ​usual, or being of a ​particularamount of ​time: The ​days are longer in ​summer than in ​winter. We had to ​wait a long ​time to ​see the ​doctor. We went away for a long ​weekend in ​April (= ​Saturday, ​Sunday, and an ​extraday or ​days). Something that is long-lost has not been ​seen for many ​years before ​appearingsuddenly: A long-lost ​diary was ​discovered among his ​papers.

longverb [I]

 us   /lɔŋ/

long verb [I] (WANT)

to ​want something very much: [+ to infinitive] She longed to move out of the ​city.
(Definition of long from the Cambridge Academic Content Dictionary © Cambridge University Press)

"long" in Business English

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longadjective

uk   us   /lɒŋ/
FINANCE, STOCK MARKET used to describe the ​situation in which you ​buy and ​keepshares, etc. because you expect them to ​rise in ​value and make a ​profit: Nobody ​wants to be long on ​stocks over a ​weekend of ​economicuncertainty, because ​stocks may ​fallsharply in ​value when ​marketsreopen on Monday.
do/have/work long hours/days WORKPLACE to ​work more ​hours each day than ​people usually do: In spite of the New Deal, ​juniordoctors are still ​working dangerously long ​hours.

longadverb

uk   us   /lɒŋ/ FINANCE, STOCK MARKET
go long (on sth) FINANCE, STOCK MARKET to ​buy or ​keepshares, etc. because you expect their ​price to ​rise, so that you can make a ​profit: The ​prospects for ​domesticdemandgrowth in the eurozone are not great, so why not go long on ​sterling, where the ​prospects for ​domesticdemandgrowth are still looking ​optimistic?
(Definition of long from the Cambridge Business English Dictionary © Cambridge University Press)
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