noun which may take the genitive case particle 'no', noun
established; fixed; predetermined
Describes something already decided or set in advance, such as rules, plans, or budgets. Often used in formal or business contexts.
Antonyms: 未定
The meeting will be held according to the predetermined schedule.
Please follow the established rules.
We proceeded with the work according to the predetermined schedule.
That decision was treated as an established fact.
The company decided to change its established policy.
確定 stresses that something has been finalized or confirmed, while 既定 stresses that it was set in advance and is now taken as a given.
undecided; not yet fixed; pending
既定 (also read きてい) means 'already established/predetermined', while 規定 (same reading) means 'regulation' or 'rule' — easy to mix up despite different kanji.
Compound of 既 (already) and 定 (decide), literally 'already decided'.