verb To pick or take someone or something (from a larger group).
verb To gather, collect.
verb To select (animals, plants, humans, etc) from a group and then kill (them) in a controlled manner, typically to reduce the numbers of the group or remove group members who have an undesirable characteristic.
verb (Should we delete this redundant sense?) To kill (an animal, person, etc), for any reason.
verb To lay off in order to reduce the numbers of; get rid of.
The company culled more employees this month.
verb To selectively not render or process certain objects, such as polygons.