Definition of undertake

• v. t. - To take upon one's self; to engage in; to enter upon; to take in hand; to begin to perform; to set about; to attempt.
• v. t. - Specifically, to take upon one's self solemnly or expressly; to lay one's self under obligation, or to enter into stipulations, to perform or to execute; to covenant; to contract.
• v. t. - Hence, to guarantee; to promise; to affirm.
• v. t. - To assume, as a character.
• v. t. - To engage with; to attack.
• v. t. - To have knowledge of; to hear.
• v. t. - To take or have the charge of.
• v. i. - To take upon one's self, or assume, any business, duty, or province.
• v. i. - To venture; to hazard.
• v. i. - To give a promise or guarantee; to be surety.