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obligatory

1 ENTRIES FOUND:
obligatory ˈblɪgəˌtori/ Brit ˈblɪgətri/ adjective
obligatory
ˈblɪgəˌtori/ Brit ˈblɪgətri/
adjective
Britannica Dictionary definition of OBLIGATORY
formal : required by a law or rule
always used before a noun, humorous : always or often included as a familiar and expected part of something