obligatory /əˈblɪgəˌtori/ Brit /əˈblɪgətri/ adjective /əˈblɪgəˌtori/ Brit /əˈblɪgətri/
adjective
Learner's definition of OBLIGATORY
1
formal : required by a law or rule(按法律或规则)必须的,有义务的 2
always used before a noun,
humorous : always or often included as a familiar and expected part of something必然的;必定的