What is the meaning of "broadening" when referring to a word's usage?

When discussing "broadening" in the context of a word's usage, it specifically refers to a word expanding its context of meaning. This process occurs when a term that once had a narrow or specific meaning begins to take on additional meanings or uses that are more general or inclusive. For example, the word "holiday" originally referred to a holy day of observance, but over time it has broadened to include any day of celebration or relaxation, regardless of religious significance. This change reflects how language evolves, adapting to the needs and experiences of its speakers, leading to the wider application of certain terms beyond their original definitions.