2. A man's personal male servant: "The valet cleaned the man's shoes every evening before retiring for the night."
2. A low period, point, or level: "There was a peak and a valley in the usage of gas throughout each month of the last year."
2. A lot of comments, questions, etc., that are directed at a person very quickly: "A volley of questions were presented to the head officer by the press."
The valet said he would valet her car right after he had driven down to the valley; however, he left quickly before a volley of questions could delay his departure.
2. The missiles thus discharged.
3. A bursting forth.
4. A shot, especially in tennis, made by hitting the ball before it touches the ground (while it's still "flying").
5. Etymology: from 1573, "discharge of a number of guns at once", from Middle French (c.1400-c.1600) volee, "flight" (about the 12th century); from Vulgar Latin volta; from Latom volatum; from volare, "to fly".
In the sporting sense (originally in tennis) is from the notion of hitting the ball in "flight". "Volleyball" is from about 1896.