observance

UK: əbˈzɜːvəns | US: əbˈzɜːrvəns

Definition
  1. n. the act of observing or complying with a law, custom, or ritual

  2. n. a formal act of celebration or acknowledgment (e.g., religious observance)

  3. n. the practice of following traditions or rules

Structure
observe <to watch, follow>ance <noun suffix indicating action or state>
Etymology

The word "observance" originates from the Latin observantia, meaning "attention, respect, or adherence." It combines observe (from Latin observare, "to watch, guard, or comply with") and the suffix -ance, which forms nouns denoting action or state. The term evolved in Middle English to emphasize both the act of watching (e.g., observing rituals) and the act of following rules or customs. The dual meaning reflects its historical use in religious and legal contexts, where attention and compliance were intertwined.

Examples
  1. The observance of traffic laws ensures safety for all drivers.

  2. Religious observance varies widely across cultures.

  3. The ceremony was held in observance of the national holiday.

  4. Strict observance of the guidelines is required in this laboratory.

  5. Her observance of family traditions brought everyone closer together.