1 usual, normal, expected, common, general, customary, routine, typical, habitual, accustomed, traditional, regular, everyday, familiar, set, humdrum:
This wine is quite good for ordinary drinking. Just display ordinary good manners when you meet the queen
2 common, conventional, modest, plain, simple, prosaic, homespun, commonplace, run-of-the-mill, everyday, average, unpretentious, workaday, mediocre, fair, passable, so so, undistinguished, unexceptional, unremarkable, uninspired, pedestrian, bourgeois, peasant, provincial, unrefined, Colloq Brit common or garden, US common-or-garden variety, garden-variety:
They bought a rather ordinary house in an inferior neighbourhood.
3 standard, norm, average, status quo, convention, expected:
Saint-Gaudens' architectural designs are far from the ordinary.
4 out of the ordinary. extraordinary, unusual, uncommon, strange, unfamiliar, different, unexpected, unconventional, curious, eccentric, peculiar, rare, exceptional, original, singular, unique, odd, bizarre, weird, offbeat, outlandish, striking, quaint, picturesque:
She was looking for a gift that was a little out of the ordinary, so I suggested a pet tarantula.