Real Dictionary

cobra
countable noun: A cobra is a kind of poisonous snake that can make the skin on the back of its neck into a hood.

COBRA in American English
any of several genera (esp. Naja) of very poisonous elapine snakes of Asia and Africa, having around the neck loose skin which is expanded into a hood when the snake is excited
Consolidated Omnibus Budget Reconciliation Act: the U.S. law that concerns the continuation of group healthcare benefits after termination of employment

cobra in American English 1
noun: any of several highly venomous, Old World elapid snakes of the genera Naja and Ophiophagus, characterized by the ability to flatten the neck into a hoodlike form when disturbed

cobra in American English 2
noun: head; skull

cobra in British English
noun: any highly venomous elapid snake of the genus Naja, such as N. naja ( Indian cobra), of tropical Africa and Asia. When alarmed they spread the skin of the neck region into a hood
noun acronym for: (in the UK) Cabinet Office Briefing Room A: the civil contingencies committee that leads the UK's responses to crises such as terrorist attacks and epidemics

COBRA in Insurance
abbreviation: In the U.S., COBRA insurance provides continuation of group health coverage insurance after an employee may have lost health insurance benefits at the end of employment.