The phrase "a large step back" is correct and usable in written English.
It can be used to describe a significant regression or decline in progress or development in a particular context.
Example: "The recent policy changes represent a large step back in our efforts to promote environmental sustainability."
Alternatives: "a significant regression" or "a major setback".
"Tying the Knot," a clear-sighted documentary on gay marriage, has the good sense to take a large step back from the emotional debate surrounding the issue and scrutinize the history of marriage itself.
He set a career high with 43 home runs in 2012, including two in the final game of the season, but he took a large step back offensively from his strong 2011 season.
Take a large step back (three to four feet) with your right leg, keeping hips facing forward.
To accomplish this, we have taken the approach of breaking down a cell into its small and canonically-autonomous parts – its suborganelles and subcompartments – such that we can take a larger step back to ask how those smaller portions can communicate both with each other and with the organism as a whole.
Before you, like some of the commenters on the post, accuse us of glorifying obesity or attempt to educate us on the health risks of being overweight, take one large step back.
Every day continues to be marked by small steps forward, and a willingness to continue on with the (sometimes large) steps back.
Thus, considering the questionable nature of Reeves's recent selections, it is not an overstatement to say that the franchise could soon take several large steps back.
It may be construed as taking large steps back to take larger ones forward eventually.
But two large steps back following her landing were enough to end her challenge for the Olympic title.
It also marked a large step toward scaling back the most ambitious foreign military operation undertaken by the Russian Army since it limped out of Afghanistan, with many tanks of the same vintage, nearly 20 years ago.
