/ ˌʌndəˈteɪk; NAmE -dərˈt-/ verb ( under·took / -ˈtʊk; NAmE / under·taken / -ˈteɪkən; NAmE /) ( formal )
1.
[ vn ] to make yourself responsible for sth and start doing it :
to undertake a task / project
University professors both teach and undertake research .
The company has announced that it will undertake a full investigation into the accident.
2.
to agree or promise that you will do sth :
[ v to inf ]
He undertook to finish the job by Friday.
[also v that ]