Definition of “i.e.” - English Dictionary

british dictionary

“i.e.” in British English

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uk /ˌaɪˈiː/ us /ˌaɪˈiː/

used especially in writing before a piece of information that makes the meaning of something clearer or shows its true meaning:

The hotel is closed during low season, i.e. from October to March.
The price must be more realistic, i.e. lower.

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(Definition of “i.e.” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“i.e.” in American English

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abbreviation for id est (= Latin for "that is"):

The hotel is closed during the off season, i.e., from October to March.
Note: Used esp. in writing after a general statement to introduce specific information or examples.

(Definition of “i.e.” from the Cambridge Academic Content Dictionary © Cambridge University Press)

“i.e.” in Business English

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uk us

used to mean "that is" before you give a more detailed explanation about something that you have just written:

The issuing house will underwrite the issue (i.e. agree to buy up any unsold shares) for a fee.

(Definition of “i.e.” from the Cambridge Business English Dictionary © Cambridge University Press)