by accident

Accidentally; unintentionally; without meaning to; as the result of an event not expected, aided, or willingly planned.

Japanese Meaning

偶然に / 意図せずに / 予期せぬ結果として

I spilled coffee on my laptop by accident during the meeting.

会議中にうっかりノートパソコンにコーヒーをこぼしてしまいました。

Sense（1）

Accidentally; unintentionally; without meaning to; as the result of an event not expected, aided, or willingly planned.

Sorry. I knocked over the vase by accident.

Sense（2）

The car got totaled by accident; a giant snowdrift fell off the church roof.

Sense（3）

By chance; unexpectedly; as the result of an unrelated series of events.

I hadn't seen her for years, but I ran into her by accident at the store.

more by accident

（ comparative ）

most by accident

（ superlative ）