i.e.
i.e. — abbreviation
1. a written abbreviation from the Latin phrase 'id est', used to introduce a more
a written abbreviation from the Latin phrase 'id est', used to introduce a more exact or clearer explanation of something that has just been said — for example, saying 'I will meet you next Friday, i.e., the 16th' to remove any doubt about which day is meant.
Our tour guide said to meet at the main entrance, i.e., the glass doors facing the park.
i.e. used between a general place and a specific one
Mayumi borrowed a book on Portuguese history, i.e., a 400-page study of the colonial period.
i.e. introducing a more detailed description of a noun
The professor asked for a primary source, i.e., an original document from that time period.
Diya registered for the advanced workshop, i.e., the session limited to students with two years of experience.
The courier will deliver the package on Friday, i.e., before the long weekend begins.
- that is
the full English equivalent of i.e.; used in the same clarifying function
- namely
more formal than i.e., often used in academic or legal writing
- in other words
slightly longer but interchangeable; works in both writing and speech
用法筆記
Always written with two periods and no spaces between the letters (i.e.), though some style guides place a comma after it (i.e.,). Typically appears in writing rather than spoken conversation.