The phrase "boundless imagination" means having limitless creativity and the ability to think of new ideas or possibilities without any restrictions or limitations. Full definition
The new spring 2015 footwear collection will enjoy original designs, bright colors and boundless imagination of designers. (afmu.net)
In this space, singles with boundless imaginations and romantic aspirations share their enthusiasm for fandoms, cosplay, and conventions. (datingadvice.com)
With its plucky preteen heroine, fantastical flying sequences, and boundless imagination for transformative physics, it seems welcoming at first, a tale to sink into like an old comfy chair. (vulture.com)