undertaking
noun [ C ]
uk/ˈʌndəˌteɪkɪŋ/ usa job, task, or piece of work that someone has decided or agreed to do:
a big/enormous/major undertaking This is an enormous and most ambitious undertaking.
formal
a formal promise:
an undertaking to do sth Many banks have given undertakings to lend more.
an undertaking that Both companies gave an undertaking that they will stop discounting.
formal
a business:
IOC is India's largest commercial undertaking.
90% of the investment portfolio comprised investment in the securities of the associated undertakings.