verb · a state of being linked or an established communication link

网络联通非常顺畅，没有任何延迟。

verb · to connect or link together, especially in a network or system

新建的铁路将这两个城市联通了。

noun, verb · China United Telecommunications Corporation, a major state-owned Chinese telecommunications provider also known as China Unicom.

由于联通的套餐很实惠，我办了一张号卡。