airport /ˈerpɔːrt/ (noun) a place where planes land and take off and that has buildings for passengers to wait in Example: I went to the airport to catch a flight to San Francisco.
Boarding pass /ˈbɔːrdɪŋ pæs/ (noun) a pass for boarding an aircraft, given to a passenger when the ticket is issued or upon check-in at the airport. Example: Your boarding passes and your departure card. Please fill it out and hand it in at the Immigration desk
check-in counter /ˈtʃɛkɪn ˈkaʊntə/ Example: Please proceed to the check-in counter to get your boarding pass.
security checkpoint /sɪˈkjɔːrɪti ˈtʃɛkpɔɪnt/ are distinguishable from border or frontier checkpoints in that they are erected and enforced within contiguous areas under military or paramilitary control. Example: We had to go through a security checkpoint before boarding the plane.
X-ray machine /ˈɛksreɪ məˈʃiːn/ is any machine that involves X-rays Example: The doctor used the X-ray machine to check for broken bones.
metal detector /ˈmetl dɪtektər/ (noun) an electronic device that you use to look for metal objects that are buried under the ground Example: The security guard used a metal detector at the entrance.
terminal /ˈtɜːrmɪnl/ (noun) a building or set of buildings at an airport where passengers arrive and leave Example: The patient is in terminal condition.
boarding /ˈbɔːrdɪŋ/ (noun) long pieces of wood that are put together to make a wall, etc. Example: The boarding process will begin in 15 minutes.
on the plane /ɒn ðə pleɪn/ Example: I read a book on the plane.
baggage claim /ˈbaɡɪdʒ kleɪm/ the place in an airport where you get your cases and bags when you arrive after flying Example: We headed straight for the baggage claim after landing.
immigration /ˌɪmɪˈɡreɪʃn/ (noun) the process of coming to live permanently in a different country from the one you were born in; the number of people who do this Example: Immigration has significantly changed the country's demographics.