terminal – n. building where people to get onto an aircraft, bus, or ship

biometric – adj. involving the application of statistical analysis to biological data

scan – v. capturing an image using a special machine

check-in –n. the act or process of reporting one's arrival at a hotel or airport

database – n. information stored in a computer in an organized structure so that it can be searched in different ways

consent – n. permission for someone to do something

digital – adj. relating to computer technology, especially the internet