verb

• (intransitive) To look with difficulty, or as if searching for something.
  "[…] I should be still / Plucking the grass, to know where sits the wind, / Peering in maps for ports, and piers, and roads;"
• (intransitive, obsolete) To come in sight; to appear.
  "And as the sun breaks through the darkest clouds, / So honour peereth in the meanest habit."

verb

• (Internet) To carry communications traffic terminating on one's own network on an equivalency basis to and from another network, usually without charge or payment. Contrast with transit where one pays another network provider to carry one's traffic.

noun

• (informal) Someone who pees, someone who urinates.
  "As was the caveat about peeing in a pool. Of course, peeing in a pool wasn't dangerous to the person ... If you peed in a pool, and you were carrying the polio virus, presumably *other* people were put at risk, not the peer (pee-er?)."