1A deficit or shortage — a state in which a required amount, quantity, or value is lacking; often used in accounting, statistics, or physical measurements.
今期は売上不足で欠損が出た。
This term we ran a deficit because sales were insufficient.
データに欠損があると解析結果が正しくないことがある。
If the data has missing values, the analysis results can be incorrect.
保険で補償されない欠損分は自己負担となる。
Any uncovered shortfall will be paid out of pocket.
2A state of being partially broken, missing, or removed — referring to partial damage or absence of parts.
この骨董品は縁に欠損があるが価値は高い。
This antique has a chip on the rim, but it's still valuable.
歯に欠損があるので治療が必要だと言われた。
I was told I need treatment because there's a defect in my tooth.