Meaning of “since” in the English Dictionary

"since" in British English

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sinceadverb

uk /sɪns/ us /sɪns/

B2 from a particular time in the past until a later time, or until now:

Emma went to work in New York a year ago, and we haven't seen her since.
He started working for the company in 1995, and has been there ever since (= and is still there).
I've long since (= long ago) forgotten any Latin I ever learned.

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sincepreposition

uk /sɪns/ us /sɪns/

sinceconjunction

uk /sɪns/ us /sɪns/

since conjunction (BECAUSE)

B1 because; as:

Since we've got a few minutes to wait for the train, let's have a cup of coffee.

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Grammar

(Definition of “since” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"since" in American English

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sinceadverb [ not gradable ]

us /sɪns/

since adverb [ not gradable ] (TIME)

from a particular time in the past until now:

Alfredo left the house at six this morning, and we haven’t seen him since.
I got my first job in 1973 and I’ve been working ever since (= from then until now).

Idiom(s)

sincepreposition

us /sɪns/

since preposition (TIME)

in the time after a particular time in the past:

A lot has happened since 1980.

sinceconjunction

us /sɪns/

since conjunction (BECAUSE)

because; as:

Since you’ve asked, I’ll tell you what I really think.

since conjunction (TIME)

from the time in the past when:

It’s been more than two years since we moved back to New York.

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