Anything votive has been dedicated or consecrated as part of the fulfillment of a vow.
This is a word related to vows: sacred promises people make, like wedding vows. A votive candle is lit when a vow is made. A votive altar has been blessed by a holy person and can be used in making religious vows. Many votive things are related to religion, like a votive ceremony related to honoring a saint. Votive activities should not be undertaken lightly, because a vow is more serious than a regular promise.