未定(みてい)

みてい
noun / na-adjective
undecided; pending; to be determined
1. undecided; pending; not yet determined; TBD
A state where something has not yet been decided or finalized. Used for schedules, plans, personnel decisions, and any situation awaiting a decision.
日程(にってい)は未定(みてい)です。
The schedule is undecided.
開催(かいさい)場所(ばしょ)はまだ未定(みてい)だが、来月中(らいげつちゅう)に決(き)まる予定(よてい)だ。
The venue hasn't been decided yet, but it's expected to be finalized within next month.
後任(こうにん)の人事(じんじ)は未定(みてい)のまま、前任者(ぜんにんしゃ)が退職(たいしょく)してしまった。
The predecessor left the company while the successor's appointment was still undecided.

A compound of 未(み) (not yet) and 定(てい) (fixed, decided). The prefix 未(み)～ is productive and appears in many words: 未定(みてい), 未満(みまん), 未知(みち), 未来(みらい).

Often abbreviated as TBD (to be determined) in bilingual business contexts.

SIMILAR WORDS:

  • 未決(みけつ) means undecided, especially in legal or formal contexts
  • 保留(ほりゅう) means 'on hold' — a deliberate postponement
  • 検討中(けんとうちゅう) means 'under consideration'

COMMON COLLOCATIONS:

  • 日時(にちじ)未定(みてい) (date and time undecided)
  • 未定(みてい)のまま (remaining undecided)
  • まだ未定(みてい) (still undecided)
general
Added 2026.3.4 17:08
14500/14985_mitei