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REFERENCE

rationale

n.
US //ˌɹæʃəˈnæɫ// UK //ɹˌæʃənˈæl// ra·tio·nale
  1. 1 logical basis (n.)
    C1 Advanced Academic Formal

    the reasons why someone decides to do something or why something exists.

    the underlying reason or set of reasons that forms the logical basis for an action or belief.

    Example

    The rationale for the new law was to improve safety on the roads.

    Example

    The CEO provided a detailed rationale for the merger, citing long-term market stability and the potential for technological synergy.

    Usage

    Often followed by the preposition 'for' or 'behind'.

  2. 2 religious vestment (n.)
    C2 Proficiency Archaic Technical Religion

    a special piece of clothing worn by some high-ranking church leaders during ceremonies.

    a liturgical vestment worn by certain Christian bishops, primarily in specific historical or high-church traditions.

    Example

    The ancient rationale was decorated with gold and precious stones.

    Example

    The museum's collection includes a rare medieval rationale, illustrating the intricate embroidery typical of fourteenth-century liturgical attire.

    Usage

    Used as a countable noun in ecclesiastical contexts.

    • vestment
Etymology 1

From Late Latin ratiōnāle.

Etymology 2

From Latin ratiōnāle.

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