The Collaborative International Dictionary of English v.0.48:

Pea \Pea\ (p[=e]), n. [OF. peis. See Poise.]
   The sliding weight on a steelyard. [Written also pee.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Peak \Peak\ (p[=e]k), n. [OE. pek, AS. peac, perh of Celtic
   origin; cf. Ir. peac a sharp-pointed thing. Cf. Pike.]
   1. A point; the sharp end or top of anything that terminates
      in a point; as, the peak, or front, of a cap. "Run your
      beard into a peak." --Beau. & Fl.
      [1913 Webster]

   2. The top, or one of the tops, of a hill, mountain, or
      range, ending in a point; often, the whole hill or
      mountain, esp. when isolated; as, the Peak of Teneriffe.
      [1913 Webster]

            Silent upon a peak in Darien.         --Keats.
      [1913 Webster]

   3. (Naut.)
      (a) The upper aftermost corner of a fore-and-aft sail; --
          used in many combinations; as, peak-halyards,
          peak-brails, etc.
      (b) The narrow part of a vessel's bow, or the hold within
          it.
      (c) The extremity of an anchor fluke; the bill. [In the
          last sense written also pea and pee.]
          [1913 Webster]

   Fore peak. (Naut.) See under Fore.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

pee \pee\, v. i.
   To urinate. [informal]
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Pee \Pee\, n.
   See 1st Pea.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pee \Pee\, n.
   1. (Naut.) Bill of an anchor. See Peak, 3
      (c) .
          [1913 Webster]

   2. Urine.
      [PJC]

   3. The act of urinating; -- used in the informal

   take a pee, meaning, to urinate.
      [PJC]

WordNet (r) 3.0 (2006):

pee
    n 1: liquid excretory product; "there was blood in his urine";
         "the child had to make water" [syn: urine, piss, pee,
         piddle, weewee, water]
    2: informal terms for urination; "he took a pee" [syn: peeing,
       pee, pissing, piss]
    v 1: eliminate urine; "Again, the cat had made on the expensive
         rug" [syn: make, urinate, piddle, puddle,
         micturate, piss, pee, pee-pee, make water,
         relieve oneself, take a leak, spend a penny, wee,
         wee-wee, pass water]