Definition of open-dated in US English:

open-dated

adjective

  • Of a ticket, reservation, etc.: valid without restriction as to date of use.

Origin

1970s; earliest use found in Peter Driscoll (b. 1942). From open + dated, after open date.

Pronunciation

open-dated

/ˌəʊp(ə)nˈdeɪtɪd/