How would you describe a crescent moon?

1.) A crescent moon is when we can view more than half of the illuminated
side of the moon.

2.) A crescent moon is when we can view less than half of the illuminated
side of the moon.

3.) A crescent moon is when we can view all of the illuminated side of the
moon.

4.) A crescent moon is when we can view none of the illuminated side of the
moon.