`  :According to Merriam-Webster (US), catch phrase as two words is incorrect. It should only be spelled as catchphrase. The Cambridge dictionary (UK) agrees.As Wiktionary is a dictionary edited by anyone, and not of the stature of either Webster or Cambridge, Wiktionary’s use of catch phrase as the primary form and catchphrase as an alternative form (similarly, the Wikipedia article, Catch phrase) would seem to be incorrect.Personally, I think that the Wikipedia article should be changed from Catch phrase to Catchphrase in keeping with both American and British authorities. Then, an editor should use AWB to globally change the spelling throughout Wikipedia from catch phrase to catchphrase. That’s my 2¢ worth! — '''''' `