cocoon (Noun) — Silky envelope spun by the larvae of many insects to protect pupas and by spiders to protect eggs.
cocoon (Verb) — Retreat as if into a cocoon, as from an unfriendly environment. ex. "Families cocoon around the T.V. set most evenings" ex. "She loves to stay at home and cocoon"
cocoon (Verb) — Wrap in or as if in a cocoon, as for protection.