noun

• (historical) A landowner from the English gentry during the early modern period.
• (UK, colloquial) Term of address to a male equal.
  "Sorry squire, I've had a look 'round the back of the shop, and uh, we're right out of parrots."

verb

• (transitive) To attend as a squire.
• (transitive) To attend as a beau, or gallant, for aid and protection.
  "[O]n ſome occaſions, he diſplayed all his fund of good humour, vvith a vievv to beguile her ſorrovv; he importuned her to give him the pleasure of ’ſquiring her to ſome place of innocent entertainment; and, finally, inſiſted upon her accepting a pecuniary reinforcement to her finances, vvhich he knevv to be in a moſt conſumptive condition."

noun

• (obsolete) A ruler; a carpenter's square; a measure.
  "But temperaunce, said he, with golden squire, / Betwixt them both can measure out a meane."