1. Enter upon an activity or enterprise
   "They undertook the challenging hike";
   - set about, attempt
    
2. Accept as a challenge
   "I'll undertake this difficult task";
   - tackle, take on
    
3. Promise to do or accomplish
   "undertake to free the prisoners";
   - guarantee
    
4. Enter into a contractual arrangement
   "The company undertook to provide cleaning services for the office building";
   - contract
    
5. Accept as a charge
   "The foster family undertook three orphaned children";
   - take in charge
    
6. [Brit] (of a driver) overtake on the wrong side
   "It's dangerous to undertake on motorways"

Derived forms: undertaken, undertakes, undertook, undertaking

Type of: accept, assure, confront, consent, face, face up, go for, initiate, pioneer, promise

Encyclopedia: Undertake