Source : Webster's Revised Unabridged Dictionary (1913)

Say \Say\, v. t. [imp. & p. p. {Said} (s[e^]d), contracted from
   sayed; p. pr. & vb. n. {Saying}.] [OE. seggen, seyen, siggen,
   sayen, sayn, AS. secgan; akin to OS. seggian, D. zeggen, LG.
   seggen, OHG. sag[=e]n, G. sagen, Icel. segja, Sw. s["a]ga,
   Dan. sige, Lith. sakyti; cf. OL. insece tell, relate, Gr.
   'e`nnepe (for 'en-sepe), 'e`spete. Cf. {Saga}, {Saw} a
   saying.]
   1. To utter or express in words; to tell; to speak; to
      declare; as, he said many wise things.

            Arise, and say how thou camest here.  --Shak.

   2. To repeat; to rehearse; to recite; to pronounce; as, to
      say a lesson.

            Of my instruction hast thou nothing bated In what
            thou hadst to say?                    --Shak.

            After which shall be said or sung the following
            hymn.                                 --Bk. of Com.
                                                  Prayer.

   3. To announce as a decision or opinion; to state positively;
      to assert; hence, to form an opinion upon; to be sure
      about; to be determined in mind as to.

            But what it is, hard is to say.       --Milton.

   4. To mention or suggest as an estimate, hypothesis, or
      approximation; hence, to suppose; -- in the imperative,
      followed sometimes by the subjunctive; as, he had, say
      fifty thousand dollars; the fox had run, say ten miles.

            Say, for nonpayment that the debt should double, Is
            twenty hundred kisses such a trouble? --Shak.

   {It is said}, or {They say}, it is commonly reported; it is
      rumored; people assert or maintain.

   {That is to say}, that is; in other words; otherwise.