gather/gain momentum

: to bring together : collect

: pick, harvest

: to pick up or amass as if by harvesting

: something brought together: such as

: a puckering in cloth made by gathering (see ¹gather 7a)

: a mass of molten glass collected for use in glassblowing

: resources or advantage acquired or increased : profit

: the act or process of acquiring something

: an increase in amount, magnitude, or degree

: to acquire or get possession of usually by industry, merit, or craft

: to win in competition or conflict

: to arrive at : reach, attain

: a property (see property 1a) of a moving body that the body has by virtue of its mass (see ²mass 1c) and motion and that is equal to the product of the body's mass and velocity

: strength or force gained by motion or by a series of events