prelude
noun
a preliminary to an action, event, condition, or work of broader scope and higher importance.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A dispiriting hand tones down the great orchestra of Nature, and all her music is set to a minor key, her ‘Jubilate’ becoming a threnody—a great preludious sob.
From Lancashire Idylls (1898) by Marshall Mather