Толковый словарь английского языка Oxford English Reference - sixth

n. & adj. --n. 1 the position in a sequence corresponding to that of the number 6 in the sequence 1-6. 2 something occupying this position. 3 any of six equal parts of a thing. 4 Mus. a an interval or chord spanning six consecutive notes in the diatonic scale (e.g. C to A). b a note separated from another by this interval. --adj. that is the sixth. Phrases and idioms sixth form Brit. a form in a secondary school for pupils over 16. sixth-form college Brit. a college for pupils over 16. sixth-former a pupil in the sixth form. sixth sense 1 a supposed faculty giving intuitive or extrasensory knowledge. 2 such knowledge. Derivatives sixthly adv. Etymology: SIX