Plural and Possessive Names: A Guide What's the difference between 'fascism' and 'socialism'? More Commonly Misspelled Words Words You Always Have to Look Up Your vs. You're: How to Use Them Correctly Popular in Wordplay See All More Words with Remarkable Origins ...
(Military) a senior officer of the Royal Air Force and certain other air forces, of equivalent rank to admiral in the Royal Navy. Abbreviation: ACM Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007...