Definition of "inadvertently"

'Dear me! I may have inadvertently touched the handle,' said he.

1929, Sir Arthur Conan Doyle, The Disintegration Machine‎

Neven Subotic hooked a volley wide after Ramsey inadvertently headed a Reus free-kick back into the danger zone, and Blaszczykowski was also off target when he met Kevin Grosskreutz's cross.

2013 November 6, Chris Bevan, “Borussia Dortmund 0-1 Arsenal”, in BBC Sport