The phrase "significant gains" means achieving or acquiring a notable or important improvement or progress in a particular area or situation. Full definition
The use of testosterone therapy for bone health results in significant gains in bone density in a relatively short time. (hghinjections.us)
However, first - grade students in the control group also made significant gains in reading comprehension. (decodingdyslexiama.org)
In the charter sector, students displaced from a closed school also made substantial gains in math — forty - six additional days — but did not make statistically significant gains in reading. (educationnext.org)