Tres en dehors意思
"Tres en dehors" is not a common phrase in French. However, "en dehors" by itself means "outside" in French, and "tres" is an adverb meaning "very" or "extremely." If you meant "tres" and "en dehors" separately, then it could be translated as "very outside" in English.
If you're looking for a common French phrase, "tres" is often used with other adjectives or phrases to modify nouns. For example, "tres bien" means "very well," and "tres belle" means "very beautiful." If you meant "tres" and "en dehors" to be part of a different phrase, please provide more context so I can give you an accurate translation.