sym ‧ bi ‧ o ‧ sis /ˌsɪmbaɪˈəʊsəs, ˌsɪmbaɪˈəʊsɪs $ -ˈoʊ-/ BrE AmE noun [singular, uncountable]
[ Date: 1600-1700 ; Language: Modern Latin ; Origin: Greek , from symbios 'living together' ]
1 . formal a relationship between people or organizations that depend on each other equally
2 . technical the relationship between different living things that depend on each other