1
: with all one's might
The soul strives amain to live and work …—R. W. Emerson
2
archaic
a
: at full speed
b
: in great haste
3
archaic
: to a high degree : exceedingly
They whom I favour thrive in wealth amain …—John Milton
Love words? Need even more definitions?
Merriam-Webster unabridged



