co·coon / kəˈkoōn/ • n. a silky case spun by the larvae of many insects for protection as pupae. ∎  a similar structure made by other animals. ∎  a covering that prevents the corrosion of metal equipment. ∎  something that envelops or surrounds, esp. in a protective or comforting way: the cocoon of her kimono | fig. a warm cocoon oflove. • v. [tr.] (usu.be cocooned) envelop or surround in a protective or comforting way: we were cocooned in our sleeping bags. ∎  spray with a protective coating. ∎  [intr.] retreat from the stressful conditions of public life into the cozy private world of the family: the movers and shakers are now cocooning. DERIVATIVES: co·coon·er n. (in the last sense of the verb ).

Cocoon ★★★ 1985 (PG-13)

Humanist fantasy in which senior citizens discover their fountain of youth is actually a breeding ground for aliens. Heartwarming, oneofa kind drama showcases elderly greats Ameche, Brimley, Gilford, Cronyn, and Tandy. A commendable, recommendable venture. Based on David Saperstein's novel and followed by “Cocoon: The Return.” 117m/C VHS, DVD . Wilford Brimley, Brian Dennehy, Steve Guttenberg, Don Ameche, Tahnee Welch, Jack Gilford, Hume Cronyn, Jessica Tandy, Gwen Verdon, Maureen Stapleton, Tyrone Power Jr., Barret Oliver, Linda Harrison, Herta Ware, Clint Howard; D: Ron Howard; W: Tom Benedek; M: James Horner. Oscars '85: Support. Actor (Ameche), Visual FX.

cocoon Case or wrapping produced by larval forms of animals (such as some moths, butterflies, and wasps) for the resting or pupal stage in their life cycle. Some spiders spin a cocoon that protects their eggs. Most cocoons are made of silk, and those of the domestic silkworm provide most of the world's commercial silk. See also butterfly; chrysalis; pupa

cocoon A protective covering for eggs and/or larvae produced by many invertebrates. For example, the larvae of many insects spin a cocoon in which the pupae develop (that of the silkworm moth produces silk), and earthworms secrete a cocoon for the developing eggs (see clitellum).

cocoon Silken sheath which the pupae of many insects, e.g. moths and bees, spin around themselves for protection during this vulnerable stage in their life cycle. In the case of the silk moth, this covering can be unwound and spun into thread for the making of silk cloth.