The noun 港 (gǎng) means "port" or "harbor" and is used to refer to places where ships dock. It also appears as a common short form for 香港 (Xiānggǎng, Hong Kong). In compound words and phrases, it denotes harbors, ports, or airport terminals.
这个港口每天都有货船进出。
zhège gǎngkǒu měitiān dōu yǒu huòchuán jìnchū.
Cargo ships come and go from this port every day.
他在港务局工作了二十年。
tā zài gǎngwùjú gōngzuò le èrshí nián.
He worked at the port authority for twenty years.
台风来了,所有船只都回港避风。
táifēng lái le, suǒyǒu chuánzhī dōu huí gǎng bìfēng.
A typhoon is coming; all ships have returned to port to take shelter from the wind.