Say is a commandline interface to the text-to-speech system built into Darwin/OS X. It will speak files specified on the command line, or text piped into it. Say allows the user to choose which voice to use, as well as change the pitch and rate that the speech is spoken.
To utter or express in words; to tell; to speak; to declare; as, he said many wise things.
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.
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.
To speak; to express an opinion; to make answer; to reply.
A speech; something said; an expression of opinion; a current story; a maxim or proverb.
the chance to speak; "let him have his say"
express in words; "He said that he wanted to marry her"; "tell me what is bothering you"; "state your opinion"; "state your name"
express a supposition; "Let us say that he did not tell the truth"; "Let's say you had a lot of money--what would you do?"
state as one's opinion or judgement; declare; "I say let's forget this whole business"
utter aloud; "She said `Hello' to everyone in the office"
speak, pronounce, or utter in a certain way; "She pronounces French words in a funny way"; "I cannot say `zip wire'"; "Can the child sound out this complicated word?"
communicate or express nonverbally; "What does this painting say?"; "Did his face say anything about how he felt?"