That dilates or expands: see the verb.

Growing or spreading like a bush.

That is becoming wider. Also occasionally: that makes something wider.

That explicates or unfolds itself. Also: that unfolds something.

Of, pertaining to, or possessed of extension.

that extends; that is expanding, spreading out, or becoming larger.

Dilating, expanding; expansive.

Becoming broad; expanding, dilating.

That increases in bulk, or becomes enlarged. expanding bullet = dum-dum bullet at dum-dum, n.

Of the nature of or tending to extension.

That increases, develops, or expands rapidly.