It means just right at two o'clock.Not a Minute More,Not a Minute Less.
28 กุมภาพันธ์ 2015
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点整 = 点钟
2 มีนาคม 2015
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点整isn't a singel word.两点整have the same meaning as两点。but if we want to say two o'clock(a correct time),we usually use 两点整。if we just want to say (time)aroud two,just say 两点is ok.
28 กุมภาพันธ์ 2015
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zero mins to 2, zero mins past 2, it's the very 2 o'clock