법이나 도덕적 규칙에 의해 요구되는 의무적인 상태
Required by a legal, moral, or other rule; compulsory.
예문:
"The new law makes it obligatory for all pet owners to microchip their animals."
"Submission of the financial report by Friday is obligatory for the department heads."
관습이나 일상적인 절차에 따라 당연히 예상되는
So customary or routine as to be expected of everyone or on every occasion.
예문:
"After the obligatory small talk about the weather, they finally started the business meeting."
"He included the obligatory thank-you note to his parents in the book's preface."