不定
Meanings
1
noun which may take the genitive case particle 'no', na-adjective, noun
unsettled; uncertain; indefinite; variable
Describes something that is not fixed, not decided, or subject to change. Used for plans, schedules, statuses, and abstract conditions. Often appears in formal or written contexts.
The meeting schedule is still undecided.
His future remained uncertain.
2
noun which may take the genitive case particle 'no', noun
Mathematics term for a value or form that is not uniquely determined, such as an indeterminate equation or an indeterminate form in calculus.
This equation has an indeterminate solution.
Usage patterns
- 〈事〉が不定だfor something (a schedule, plan, etc.) to be unsettled or undecided
The departure date and time are still undecided.
- 不定の〈物〉an indeterminate ~ (in math, a value or form not uniquely determined)
That equation has an indeterminate solution.
- 住所不定having no fixed address (often used in news reports about suspects)
A man with no fixed address and no job was arrested.