Delivered to the airline (or train line, ferry, etc.) during check-in to be stored in an inaccessible area to the passenger (the hold) during the flight (or other journey).
Verified or validated in some way.
Of consonants, glottalized.
Having a pattern of checks; checkered.
Of syllables, having a coda.
Going nowhere; blocked.
A road with no exit.
A position that offers no hope of progress.
To come to a dead-end.