Definition of: undertake

(un′dər·tāk′) v. ·took, ·tak·en, ·tak·ing v.t.
1. To take upon oneself; agree or attempt to do; begin.
2. To contract to do; pledge oneself to.
3. To guarantee or promise.
4. To take under charge or guidance.
5. Obs. To enter into combat with.
—v.i.
6. To make oneself responsible or liable; be surety: with for. See synonyms under ENDEAVOR.