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English definition of “long”

long

adjective uk   /lɒŋ/ us    /lɑːŋ/

long adjective (TIME)

A1 continuing for a large amount 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.Lasting for a long time

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 post office. We're still a long way from the station.Low, short and shallow

long adjective (MANY WORDS)

A2 describes a piece of writing that has a lot of pages or words: a long letter/book/reportLasting for a long time

long

adverb uk   /lɒŋ/ us    /lɑːŋ/

long adverb (TIME)

A2 used to mean "(for) a long time", especially in questions and negative sentences: 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.Lasting for a long time 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 -ing form of the verb to mean that a state or activity has continued for a long time: a long-awaited letter long-serving employeesLasting for a long time

long adverb (IF)

as/so long as 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 your friends by all means - just so long as I know how many are coming.Connecting words which express a condition
Grammar

long

long

(Definition of long adjective, adverb, verb, noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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