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

Moby Thesaurus II by Grady Ward, 1.0:

165 Moby Thesaurus words for "clarion":
   English horn, alpenhorn, alphorn, althorn, alto horn, bagpipe,
   ballad horn, baritone, bass horn, bassoon, bay, beep, bell, blare,
   blast, blat, block flute, blow, blow a horn, blow the horn,
   bombard, bourdon, brass choir, brass wind, brass-wind instrument,
   brasses, bray, bugle, bugle call, bugle horn, call to arms,
   call-up, carillon, catchword, cello, claribel, clarinet,
   clarion call, clear, cloudless, concert flute, conscription,
   cornet, cornet-a-pistons, corno di caccia, cornopean, cromorna,
   cymbel, diapason, doodle, double-bell euphonium, double-tongue,
   dulciana, euphonium, exhortation, fife, fine, flute, flute stop,
   foundation stop, fourniture, gamba, gedeckt, gemshorn,
   go for broke, gung ho, harmonic flute, helicon, honk, horn,
   hunting horn, hybrid stop, key trumpet, koppel flute, larigot,
   levy, lip, lituus, lur, mellophone, melodia, mixture, mobilization,
   muster, mutation stop, nazard, oboe, octave, ophicleide,
   orchestral horn, organ stop, peal, piccolo, pipe, pleasant,
   plein jeu, pocket trumpet, posaune, post horn, principal, quint,
   quintaten, rainless, rally, rallying cry, rank, ranket, rebel yell,
   recruitment, reed stop, register, rohr flute, sackbut, saxhorn,
   saxtuba, serpent, sesquialtera, shawm, shriek, slide trombone,
   sliphorn, slogan, sound, sound a tattoo, sound taps, sousaphone,
   spitz flute, squeal, stop, stopped diapason, stopped flute,
   string diapason, string stop, sunny, sunshiny, tenor tuba, tierce,
   tongue, toot, tootle, tremolo, triple-tongue, tromba, trombone,
   trumpet, trumpet call, tuba, tweedle, twelfth, unclouded,
   unda maris, undarkened, valve trombone, valve trumpet, vibrato,
   viola, voix celeste, vox angelica, vox humana, war cry, war whoop,
   watchword, whistle, wind, wind the horn



The Free On-line Dictionary of Computing (30 December 2018):

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)


U.S. Gazetteer Counties (2000):

Clarion -- U.S. County in Pennsylvania
   Population (2000):    41765
   Housing Units (2000): 19426
   Land area (2000):     602.439551 sq. miles (1560.311207 sq. km)
   Water area (2000):    6.507066 sq. miles (16.853222 sq. km)
   Total area (2000):    608.946617 sq. miles (1577.164429 sq. km)
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             41.161371 N, 79.440521 W
   Headwords:
    Clarion
    Clarion, PA
    Clarion County
    Clarion County, PA


U.S. Gazetteer Places (2000):

Clarion, PA -- U.S. borough in Pennsylvania
   Population (2000):    6185
   Housing Units (2000): 2192
   Land area (2000):     1.492961 sq. miles (3.866752 sq. km)
   Water area (2000):    0.029960 sq. miles (0.077596 sq. km)
   Total area (2000):    1.522921 sq. miles (3.944348 sq. km)
   FIPS code:            13800
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             41.211791 N, 79.384005 W
   ZIP Codes (1990):     16214
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Clarion, PA
    Clarion


U.S. Gazetteer Places (2000):

Clarion, IA -- U.S. city in Iowa
   Population (2000):    2968
   Housing Units (2000): 1355
   Land area (2000):     2.744095 sq. miles (7.107172 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    2.744095 sq. miles (7.107172 sq. km)
   FIPS code:            13620
   Located within:       Iowa (IA), FIPS 19
   Location:             42.731112 N, 93.731095 W
   ZIP Codes (1990):     50525
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Clarion, IA
    Clarion