Run·ner n.
 1. One who, or that which, runs; a racer.
 2. A detective. [Slang, Eng.]
 3. A messenger.
 4. A smuggler. [Colloq.]
 5. One employed to solicit patronage, as for a steamboat, hotel, shop, etc. [Cant, U.S.]
 6. Bot. A slender trailing branch which takes root at the joints or end and there forms new plants, as in the strawberry and the common cinquefoil.
 7. The rotating stone of a set of millstones.
 8. Naut. A rope rove through a block and used to increase the mechanical power of a tackle.
 9. One of the pieces on which a sled or sleigh slides; also the part or blade of a skate which slides on the ice.
 10. Founding (a) A horizontal channel in a mold, through which the metal flows to the cavity formed by the pattern; also, the waste metal left in such a channel. (b) A trough or channel for leading molten metal from a furnace to a ladle, mold, or pig bed.
 11. The movable piece to which the ribs of an umbrella are attached.
 12. Zool. A food fish (Elagatis pinnulatus) of Florida and the West Indies; -- called also skipjack, shoemaker, and yellowtail. The name alludes to its rapid successive leaps from the water.
 13. Zool. Any cursorial bird.
 14. Mech. (a) A movable slab or rubber used in grinding or polishing a surface of stone. (b) A tool on which lenses are fastened in a group, for polishing or grinding.

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