Cancelled means called off — it is not happening, and no new date has been given. The train, the match, the appointment you had waited three weeks for.
The word does a great deal of work in travel and in diaries: a cancelled flight, a cancelled meeting, a cancelled order. Cancel is the verb behind it, and you cancel a subscription, a card or a plan. Watch the spelling, because British English doubles the l in cancelled while American English writes canceled with one. Recent years have added a new sense, in which a person is said to be cancelled when the public turns on them and withdraws its support.
Middle English
cancellen
English
cancel
English, today
cancelled
Built from
cancel comes from Middle English cancellen. From Middle English cancellen, from Anglo-Norman canceler (“to cross out with lines”) (modern French chanceler (“to stagger, sway”)), from Old French canceler, from Latin cancellō (“to make resemble a lattice”), from cancellus (“a railing or lattice”), diminutive of cancer (“a lattice”).
Etymology from Wiktionary, CC BY-SA