n. 1. A person whose business is to pack things; especially, one who packs food for preservation or for the market; as, a pork packer. [ 1913 Webster ]
2. A ring of packing or a special device to render gas-tight and water-tight the space between the tubing and bore of an oil well. [ U. S. ] [ Webster 1913 Suppl. ]
prop. n. A genus of American or East Asian perennial herbs with yellow to orange or red flower rays; it is sometimes included in genus Senecio. Syn. -- genus Packera. [ WordNet 1.5 ]