Er*ro"ne*ous (?), a. [L. erroneus, fr. errare to err. See Err.] 1. Wandering; straying; deviating from the right course; -- hence, irregular; unnatural. [Obs.] "Erroneous circulation." Arbuthnot.

Stopped much of the erroneous light, which otherwise would have disturbed the vision.

2. Misleading; misled; mistaking. [Obs.]

An erroneous conscience commands us to do what we ought to omit.

3. Containing error; not conformed to truth or justice; incorrect; false; mistaken; as, an erroneous doctrine; erroneous opinion, observation, deduction, view, etc. -- Er*ro"ne*ous*ly, adv. -- Er*ro"ne*ous*ness, n.

• Containing an error; inaccurate
       
• His answer to the sum was erroneous
  
• Derived from an error
       
• His conclusion was erroneous as it was based on a false assumption
  
• Mistaken
       
• His choice at the line-up was erroneous as he had only seen the mugger for an instant