1. An agreement with something or someone: The candidate's beliefs are in consonance with his political party's objectives and proposals.
2. Consisting of harmonious sounds which are pleasing to hear: Laura and Jim enjoyed the concert which was full of wonderful consonances from the beginning to the end.
3. The various letters that make pronunciations; usually, at the endings of words: A few examples of consonances include the letters "st" as in the words "first, last, forest, host, slowest, fast, most", etc.