noun, na-adjective
uncertainty; mutability; indeterminate
Describes something not fixed, not decided, or subject to change. Often used in formal or technical contexts such as law, mathematics, and philosophy.
彼の予定はまだ不定だ。
His schedule is still uncertain.
この契約には不定な要素が多い。
This contract has many indeterminate elements.
Compound of 不 (fu, 'not') and 定 (jō, 'fixed, decided'). The reading ふじょう is the standard on'yomi combination.