We use sharp to describe things like knives or pencils that have a thin edge or point. These things can cut or poke easily.
This knife is very sharp and cuts well.
Be careful, the pencil has a sharp tip.
When a person is sharp, they are smart and understand things quickly and clearly.
He is very sharp and learns fast.
She gave a sharp answer to the question.
Sharp describes a tone or voice that is sudden, loud, or a little rough, often showing anger or seriousness.
He gave a sharp reply to the question.
She spoke in a sharp voice when upset.
We use sharp with time to mean exactly at that time, not earlier or later.
The meeting starts at 3 o’clock sharp.
Please be here at 7 sharp.
