WordNet sense 1 (the smallest whole number or a numeral representing this number):

one, single, unity, I

WordNet sense 2 (someone who is dazzlingly skilled in any field):

adept, champion, genius, hotshot, maven, sensation, star, superstar, virtuoso, whiz, whizz, wiz, wizard, mavin, adept

WordNet sense 3 (a major strategic headquarters of NATO; safeguards an area extending from Norway to Turkey):

Allied Command Europe

WordNet sense 4 (succeed at easily):

nail, breeze through, pass with flying colors, sail through, sweep through

WordNet sense 5 (of the highest quality):

crack, fantastic, first-rate, super, tiptop, topnotch, A-one, tops

WordNet sense 6 (of high or superior quality or performance):

superior