verb:to begin a movement, activity, or undertaking
We will start the meeting at 9 AM sharp.
noun:the point in time or place at which something begins
The start of the race was signaled by a gunshot.
noun:a sudden movement of surprise or alarm
A loud noise caused him to wake with a start.
verb:to set in motion or operation
Can you start the car so it can warm up?
verb:to move suddenly or abruptly, often in reaction to a stimulus
The horse started when it heard the thunder.
