Senses
四海为家/ 四海為家 to feel at home anywhere
to be able to settle down and feel at ease wherever one goes
四海为家/ 四海為家 to rule the whole country
(literary) to consider the entire country or world as one's own, originally describing the vast power of an emperor ruling over a unified territory
四海为家/ 四海為家 to lead a wandering life
to roam about without a fixed residence; to live a nomadic or displaced existence