n. One who, or that which, ticks, or produces a ticking sound, as a watch or clock, a telegraphic sounder, etc.n. A telegraphic receiving instrument that automatically prints off stock quotations (stock ticker), market report, or other news on a paper ribbon or “tape.”n. an electronic instrument receiving information by transmision from a remote source and displaying it in readable fashion, not necessarily on paper tape (e.g. on a video display terminal or moving ribbon of electronically controlled lights).n. The heart.