A semicolon (;) connects closely related independent clauses without a conjunction, or separates items in a complex list. It always goes between complete thoughts or major list elements.
Semicolons act as super-commas for linking independent clauses (complete sentences that could stand alone). They create stronger connections than commas but avoid the finality of periods.
For example:
I have a big test tomorrow; I can't go out tonight.
(Instead of: I have a big test tomorrow. I can't go out tonight.)
Semicolons also separate items in lists containing internal punctuation:
On my trip I visited Paris, France; Madrid, Spain; and Rome, Italy.
Semicolons serve three primary functions:
According to the Grammarly Style Guide, semicolons help writers "balance complexity and readability."
People often confuse semicolons with colons (:), which introduce lists, explanations, or examples. Semicolons never introduce new material-they connect existing ideas.
Incorrect:
My favorite colors are ; blue, green, and yellow.
Correct:
My favorite colors are blue, green, and yellow.
The Purdue Online Writing Lab notes that semicolons are frequently overused or misused in place of commas.
Don't use semicolons when:
For example, this sentence doesn't need a semicolon:
I need to buy apples, bread, and milk.
Before using a semicolon, try replacing it with a period. If both clauses still make sense separately, a semicolon likely works. If one clause feels incomplete alone, use a comma instead.
I tested this rule while editing an article about intermittent fasting. The original draft had semicolons separating unrelated thoughts. After applying the test, I replaced most with periods for clearer structure.