noun
Noun meaning loss or being lost; usually appears in compounds such as ロストバゲージ (lost baggage) or ロストテクノロジー (lost technology).
空港でロストバゲージの手続きをした。
I filed a lost baggage claim at the airport.
noun or participle which takes 'suru', transitive verb
Transitive suru-verb meaning to lose something, often used in technical or business contexts (e.g., losing data, items, or opportunities).
データをロストしてしまった。
I lost the data.
輸送中に荷物をロストするケースがある。
There are cases where luggage is lost during transport.