Semicolon Punctuation
A semicolon is stronger than a comma but does not by itself turn a dependent clause into an independent one. Check that the major units on both sides can stand as complete clauses when using the core clause-joining pattern, and follow house style for lists.
Use a semicolon to join closely related independent clauses when you do not use a coordinating conjunction, and commonly before a conjunctive adverb that links two independent clauses. Semicolons can also separate complex list items under some styles.
Key details
Further guidance
Conjunctive Adverbs
When a conjunctive adverb links two independent clauses, the pattern commonly uses a semicolon before it and a comma after it: “The trial ended; however, analysis continued.”
Diagnose
If one side cannot stand as an independent clause, check whether another mark or no internal punctuation is needed instead of inserting a semicolon mechanically.
Independent Clauses
Use a semicolon when two complete clauses are closely related and you want a tighter connection than a full stop: “The trial ended; analysis continued.”
Lists
Semicolons can separate list items that already contain commas, but list punctuation is strongly house-style dependent.
Worked Example
“We revised the methods; the results were unchanged” uses two independent clauses. “Because the results were unchanged; we stopped” misuses the semicolon because the opening dependent clause cannot stand alone.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Sentence Punctuation Patterns (opens in a new tab)Purdue Online Writing Lab · Purdue uses independent-clause patterns to explain complete sentences and how independent clauses are joined, giving a practical writing boundary beyond definition alone.
- Semicolons (opens in a new tab)Australian Government Style Manual · Current government style guidance gives bounded prose uses and house-style caveats for semicolons.