"IE" stands for the Latin phrase "id est," meaning "that is" or "in other words." It introduces a rephrasing, clarification, or specific example of what preceded it. Always use "ie" in lowercase and enclose it in commas.
The term "ie" functions as a clarifier. It replaces or explains the preceding statement. Unlike "eg" (for example), which introduces examples, "ie" provides a direct equivalent or specific instance.
| Context | Example |
|---|---|
| Clarifying a vague statement | I'll have a dessert, ie, the chocolate cake. |
| Specifying a term | She's studying biology, ie, the science of living organisms. |
Many confuse "ie" with "eg." While "ie" specifies, "eg" exemplifies. For instance:
Another error is omitting commas. Without them, "ie" becomes part of the sentence, losing its clarifying role. For example:
Incorrect: "She ordered coffee ie it was her favorite drink." (Lacks clarity)
Correct: "She ordered coffee, ie, it was her favorite drink."
Always surround "ie" with commas. This isolates it as a parenthetical element. Never use it at the start or end of a sentence without additional context.
For emphasis, italicize "ie" to distinguish it from surrounding text. However, this is optional.
When writing instructions for assembling furniture, I initially used "ie" incorrectly: "Use a screwdriver ie the tool provided." The lack of commas confused readers. After revising to "Use a screwdriver, ie, the tool provided," the meaning became clear.
According to The Chicago Manual of Style (17th ed.), "ie" should always appear in lowercase and within commas. The Grammarly blog confirms this rule, adding that "ie" specifies while "eg" exemplifies.