IPA: /ˈpriːbɔːrd/
KK: /priˈbɔrd/
To get on an airplane or other vehicle before the usual time or before other people.
Passengers are allowed to preboard the flight if they need extra time.
Past: preboarded
Past Participle: preboarded
To let someone get on a vehicle, especially an airplane, before the usual time or before others.
Passengers were allowed to preboard the flight due to their special needs.
Past: preboarded
Past Participle: preboarded
**Preboard** → It is formed from "pre-" (meaning before) and "board" (from Old English *bord*, meaning a flat surface or platform). The word "preboard" means to board or get on something before the usual time or before others.
Think of getting on a vehicle 'before' ('pre-') the usual time — that's what preboard means.