This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Not able to be dated; that may be not be ascribed a date (or age).

adj. Not dateable; unsuitable for romantic outings; unattractive.

adj. not capable of being given a date

"In fact, Josh was one of the sweetest men Anna had ever met—which made him utterly undatable in the long term."

undated    dateless