Senses
中外 China and abroad
China and foreign countries; domestic and foreign
中外 inner and outer
literary; the internal and external; one's inner thoughts and outward appearance
中外 central and local
literary; central government and local authorities
中外 cousins
archaic; cousins of a different surname (children of one's paternal aunt or maternal uncle/aunt)
中外 the court and the public
literary; the imperial court and the common people; the capital and the provinces