What is the meaning of Pitchfork?

An agricultural tool comprising a fork with sparse, light tines, attached to a long handle, used for pitching hay (especially loose hay) high up onto a stack (as on a wagon or haystack, or into a haymow).

A similar fork with slightly more and heavier tines, used for mucking stalls and pitching soiled bedding into a wagon or manure spreader.

Any fork used for farm labor, even a digging fork (but such usage is often considered ignorant by experienced farmers).

A tuning fork.

To toss or carry with a pitchfork.

To throw suddenly.

Source: wiktionary.org