blackline

== English == === Etymology === From black +‎ line; compare redline, greenline. === Noun === blackline (plural blacklines) A document indicating the differences between two versions of another document. (firefighting) A line of deliberately burned material created to stop the advance of a larger fire. === Verb === blackline (third-person singular simple present blacklines, present participle blacklining, simple past and past participle blacklined) (transitive) To compare versions of (a document) by this method. ==== See also ==== blackline tilefish === Anagrams === clinkable