[OLD REGGIE]

I DID look it up. You’re wrong.

In the following post I have copied #2409 by Philo-Junius. The PRIMARY definition from Dictionary.com is printed in red.

It’s not just in airplanes:

Co-stars are subordinate to the stars;
1. a performer, esp. an actor or actress, who shares star billing with another.

Co-conspirators are subordinate to the main conspirators;
a fellow conspirator; associate or collaborator in a conspiracy.

Coadjutors are subordinate to suffragan bishops;
This is correct.

Co-dependents are subordinate to their dependents;
1. Mutually dependent.

we could go on and on, but really there’s little point.

I am not going to play your childish game beyond this point.

[Philo-Junius]

Your editing verges on the disingenuous: http://dictionary.reference.com/browse/co-star co·star Audio Help /n. ˈkoʊˌstɑr; v. ˈkoʊˈstɑr/ Pronunciation Key - Show Spelled Pronunciation[n. koh-stahr; v. koh-stahr] Pronunciation Key - Show IPA Pronunciation noun, verb, -starred, -star·ring. –noun 1. a performer, esp. an actor or actress, who shares star billing with another. 2. a performer whose status is slightly below that of a star. –verb (used without object) 3. to share star billing with another performer. 4. to receive billing of slightly less status than that of a star. –verb (used with object) 5. to present (two or more actors) as having equal billing or prominence. 6. to present as having slightly less status than that of a star.

[Dr. Eckleburg]

Thanks for substantiating your point so well, even in the face of all this mindless deflection.

[Mad Dawg]

I'm not clear on WHOSE childish game it is to contradict several dictionaries and common usage.

The Boss lady and I watched "Operation Petticoat" last night. It was just as silly as I remembered from 49 years ago. It "starred" Cary Grant and Tony Curtis. It "co-starred" people whose names, listed later, I did not recognize. Here the use of "star" and "co-star" (or participial forms) I derive from the "titles" shown at the beginning of the film.

When we speak of co-dependents, usually there is one, sort of starring, sick person, the family alcoholic or whatever. Around him or her cluster people who have adopted pathological ways of acting in response to his illness. At least that's the way they were teaching it a couple of decades ago. Those people with the "secondary" sickness are the "co-dependents".