To move suddenly, or be excited, on feeling alarm; to start.
To excite by sudden alarm, surprise, or apprehension; to frighten suddenly and not seriously; to alarm; to surprise.
A sudden motion or shock caused by an unexpected alarm, surprise, or apprehension of danger.
a sudden involuntary movement; "he awoke with a start"
move or jump suddenly, as if in surprise or alarm; "She startled when I walked into the room"
a memorable sudden event that suddenly passes