Definitions

1. adverb

unexpectedly or at a sudden moment

“She walked into the room asudden and surprised everyone.”

2. preposition

used to indicate a sudden movement or action in a particular direction

“The crowd poured out of the stadium asudden, spilling onto the streets.”

3. conjunction

used to indicate that two or more things happen suddenly or at the same time

“The lights went out asudden, and the music stopped simultaneously.”