i.e. is a Latin abbreviation that means “that is” or “in other words.”

What does i.e. mean?

  • i.e. comes from the Latin phrase id est , which literally means “that is.”
  • You use it when you want to clarify, restate, or more precisely define what you just said, not to give random examples.

Think of i.e. as if you’re writing: “Let me say that another way, more clearly.”

Simple examples

  • The hotel is closed during low season, i.e. from October to March.
  • The price must be more realistic, i.e. lower.
  • The meeting is in the main room, i.e. the large conference hall on the first floor.

In each case, the part after i.e. is an exact clarification of what came before.

i.e. vs. e.g. (common confusion)

People often mix up i.e. and e.g., but they do different jobs.

  • i.e. = “that is / in other words” → gives a precise restatement.
  • e.g. = “for example” → gives one or more examples, not a strict definition.

Quick contrast:

  • I love citrus fruits, e.g., oranges and lemons. (just some examples)
  • I love citrus fruits, i.e., fruits in the orange family. (a clarification/definition)

Tiny usage tips

  • Style guides usually keep the dots: i.e. , and often add a comma after it in modern English: “i.e., like this.”
  • It’s used more in writing (academic, business, formal emails) than in casual speech.
  • If you can replace it with “in other words” or “that is” and the sentence still makes sense, i.e. is the right choice.

TL;DR: i.e. means “that is / in other words” and introduces a clear, exact explanation of what you just wrote, not just one example.