Definition of "obambulation"

Their stationarie obambulations about the limits of parishes.

1600, Matthew Sutcliffe, A briefe replie to a certaine odious and slanderous libel ...‎, London: Arn. Hatfield, page 100

Let us then passe the Pomeridian hours in obambulation: for I am defatigate with session.

1662, William Clark, Marciano; or, the Discovery‎, reprint edition, published 1871, page 19

I joined him in one of our obambulations, to witness the performance of Macbeth, and a particular friend of my friend's friend was to sustain the principal character.

1833, Thespiana (pseudonym), “Penny Private Theatres”, in The Olio, Or, Museum of Entertainment‎, volume XI, page 149