undertaking noun
1 piece of work/business
ADJ. considerable, large, major, serious | worthwhile | hazardous, risky | joint the first joint undertaking of the two societies | commercial, financial We have to decide if this is a worthwhile commercial undertaking.
2 formal promise
ADJ. solemn | express | irrevocable | voluntary | verbal, written | contractual | government | public
VERB + UNDERTAKING give (sb) He gave an undertaking not to leave the country before the trial. | seek | obtain | carry out, honour, renege on The factory failed to honour its undertaking to stop dumping waste into the local river. | sign