have a voice in. Have the right or power to influence or make a decision about something. For example, I want to have a say in this matter, or Citizens want to have a voice in their local government.
[ c. 1600
have one's say. Express one's views, as in As soon as I've had my say I'll sit down.
[ Late 1600s
have the say. Be in command, as in The general has the say over which troops will be sent.
[ Early 1800s