verb (used without object) Obsolete.
  1. to engage in skirmishes in advance of troops of an army.
  2. to reconnoiter; scout; survey.

Origin of pickeer

1635–45; < Dutch pikeeren, variant of pikereien < French picorée < Spanish pecorea pillaging, literally, cattle-raiding, verbid of pecorear to carry off cattle, derivative of Latin pecus cattle
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