A run‐on sentence is two or more independent clauses joined together with insufficient punctuation. This means that there are two or more complete sentences fused into one sentence. Use a colon: a ...

An error known as a comma splice (or comma fault) results when a comma is mistakenly placed between two independent clauses that are not joined by a coordinating ...

(She applied the same rule for fragments and run-on sentences.) My colleague, however, says it's a matter of style. The Economist doesn't have a ruling on comma splices in the style book ...

Take the comma splice—the bane of composition teachers everywhere, especially now that however seems to have turned into a conjunction in sentences like, “The United States is a democracy ...

A comma splice is the use of a comma, instead of a coordinating conjunction or a semicolon, between the two independent clauses of a compound sentence. If the comma is left out, a second grammatical ...