The phrase "large loop" refers to a bigger circle or pathway. It can be used to describe a longer or more complex route or process. It suggests that something is more extensive or time-consuming compared to a smaller or simpler loop. Full definition
It's the part of the Sun that is visible in photographs of Solar Eclipses that show large loops of structure extending well beyond the Sun, like the image below. (milky-way.kiwi)
When the jet stream makes large loops in the winter, cold air moves south, and milder air moves moves towards the pole. (breitbart.com)
Game Pick: «Ziczac» (0rel, freeware) «A simple scoring - based puzzler where players acquire points by making small squares with four tiles of the same colour, or attempt to create large loops for a special multiplier bonus. (gamesetwatch.com)