verb, adjective, modal particle · to be consistent with or to conform to a standard, such as logic, reason, or law.

他这样做实在是不通情理。

verb · to go through, open, clear, or connect a passage

隧道终于打通了。

measure word · classifier for letters, telegrams, phone calls, or actions

我刚才打了一通电话。

verb, pronoun, noun · to communicate or exchange information with others

我们经常通电话。

measure word · classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)

他无缘无故地挨了一通骂。

adjective, verb · smooth, unobstructed, or successful, as in the idiom '万事亨通 wàn​shì​hēng​tōng' (may everything go smoothly).

祝你万事亨通。

verb · refers to a character or word that is interchangeable with or has the same meaning as another in historical or linguistic contexts.

在一些古文中，“伯”通“百”。

noun · to know a subject well or a suffix indicating an expert

他是一个中国通。

noun · continuously from beginning to end; throughout the whole duration of a time period.

他通宵加班。