non-refundable en · ADJ
Etymology
From non- + refundable.
Meanings
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(alt-of, alternative, not-comparable) Alternative form of nonrefundable.
alt of nonrefundable
"[...] Passengers with non-refundable Advance tickets are still able to exchange them, for a fee, for future travel."
2020 October 21, “Network News: No refund or extensions for unused railcards”, in Rail, page 10: