Undertake a project, trip, or responsibility without the aid or presence of others. For example, If you decide not to help, I'll just go it alone. [Mid-1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
How to use go it alone in a sentence
So, are the chances of a go-it-alone military strike reduced or increased as a result of the Geneva agreement?7 Questions About the Geneva Deal on Iran You Might Be Asking | Matthew Kalman | November 25, 2013 | THE DAILY BEAST