NOUN (1)

1. a medieval brass instrument with a clear shrill tone;


VERB (2)

1. blow the clarion;

2. proclaim on, or as if on, a clarion;


ADJECTIVE (1)

1. loud and clear;
- Example: "a clarion call"

The Collaborative International Dictionary of English v.0.48:

Clarion \Clar"i*on\, n. [OE. clarioun, OF. clarion, F. clairon,
   LL. clario, claro; so called from its clear tone, fr. L.
   clarus clear. See Clear.]
   A kind of trumpet, whose note is clear and shrill.
   [1913 Webster]

         He sounds his imperial clarion along the whole line of
         battle.                                  --E. Everett.
   [1913 Webster]

WordNet (r) 3.0 (2006):

clarion
    adj 1: loud and clear; "a clarion call"
    n 1: a medieval brass instrument with a clear shrill tone
    v 1: blow the clarion
    2: proclaim on, or as if on, a clarion

The Free On-line Dictionary of Computing (19 January 2023):

Clarion

    A family of systems from SoftVelocity, Inc. for
   building database applications on Microsoft Windows.
   Clarion products include Clarion 4GL language with a C++ and
   Modula-2 compiler.  Clarion products support fast,
   efficient database application development.  Clarion was
   originally developed by Clarion Software Corporation, later to
   become TopSpeed Corporation.  In 2000, the Clarion product
   line was acquired by SoftVelocity Inc.

   (2003-10-15)