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Webster 1913 Edition

Noun.

[L.

oberrate

to wander about.]

A wandering about.

[Obs.]

Jonhson.

Noun.

[L. oberro; ob and erro, to wander.] The act of wandering about. [Little used.]

oberration ‎(plural oberrations)

(obsolete) A wandering about.
(Can we find and add a quotation of Johnson to this entry?)
- 1838, Pierce Egan, The Pilgrims of the Thames in Search of the National!, W. Strange (London), p. 214 (Google preview):
  [T]hey wandered through the park, the enjoyment of which oberration, Pundit declared was excessive.