Simple Definition of seatmate

from our Learner's Dictionary

seatmate

noun

ˈsiːtˌmeɪt How to pronounce seatmate (audio)
plural seatmates
US : a person who sits next to you on a bus, airplane, etc.
My seatmate on the flight to Rome was very friendly.

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“Seatmate.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/seatmate. Accessed 18 Jun. 2026.

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