1) to produce, take on, a colour, usually by dropping (something) in a liquid (dying)

2) an apparatus used for a jump form a plane or for dropping supplies etc (parachute)

3) cheap wine; a dull sound of something heavy dropping (plonk)

4) a sound (as if) of a small smooth object dropping into water without a splash (plop)

5) to cook (an egg) by cracking the shell and dropping the contents into boiling water; (to go on private land and) take (animals, fish etc) illegally (poach)