I
n.
1) a quantum ~
2) a ~ forward
II
v.
1) ( d ; intr. ) to ~ at ('to be eager for') (to ~ at an opportunity)
2) ( d ; intr. ) to ~ out of (the dolphin ~ed out of the water)
3) ( d ; intr. ) to ~ over (to ~ over a fence)
4) ( misc. ) to ~ to smb.'s defense ('to defend smb. with enthusiasm')