Cos'è needle? Cos'è needle? A small, slender implement used for sewing or surgical suturing, made usually of polished steel and having an eye at one end through which a length of thread is passed and held.Any one of various other implements, such as one used in knitting or crocheting.A slender piece of jewel or steel used to transmit vibrations from the grooves of a phonograph record.A slender pointer or indicator on a dial, scale, or similar part of a mechanical device.A magnetic needle.A hypodermic needle.Informal A hypodermic injection; a shot.Chiefly Upper Northern U.S. See dragonfly. See Regional Note at dragonfly.A narrow stiff leaf, as those of conifers.A fine, sharp projection, as a spine of a sea urchin or a crystal.A sharp-pointed instrument used in engraving.Informal A goading, provoking, or teasing remark or act.To prick, pierce, or stitch with a small, slender, sharp-pointed implement.Informal To goad, provoke, or tease.Slang To increase the alcoholic content of (a beverage).To sew or do similar work with a small, slender, sharp-pointed implement.