v. 1a. To put into action. Mr. Green was not able to carry through his plans for a hike because he broke his leg. 1b. To do something you have planned; put a plan into action. Jean makes good plans but she cannot carry through with any of them.
Compare: GO THROUGH WITH, CARRY OUT. 2. To keep (someone) from failing or stopping; bring through; help. When the tire blew out, the rules Jim had learned in driving class carried him through safely.