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

Accidental; as the result of some unforeseen happening or series of events; unexpected; resulting from an event without the foresight, expectation, aid, or design of the person by whose agency it was caused; unintentional.

(idiomatic) A fact, situation, or personal characteristic, which may be desirable or undesirable, resulting from the circumstances into which a person was born, and which is therefore entirely beyond their control.

A manner of breathing in an organism that supplements or temporarily replaces the principal manner of breathing.

(law) One who commands or counsels an actionable offense, not being present at its commission.

(physics) A form of mass spectrometry in which ions are accelerated to extraordinarily high kinetic energies before mass analysis.

(informal, humorous) Your mission or task; what you must do.

An address on letters, etc., to a person or business that does not wish or is not able to receive post at a permanent or actual address.

(nautical) a flight of stairs or a ladder for lowering over the side of a ship for access to and from a small boat.

A road giving entry to a region or, especially, to a motorway. / (more localised) A road giving access to a particular place.