Wordnet 3.0
NOUN (1)
1. 
 (music) a composition or passage that is to be performed in a slow and dignified manner; 
ADJECTIVE (1)
1. 
 very slow in tempo and broad in manner; 
ADVERB (1)
1. 
 slowly and broadly; 
The Collaborative International Dictionary of English v.0.48:
Largo \Lar"go\, a. & adv. [It., large, L. largus, See Large.]
   (Mus.)
   Slow or slowly; -- more so than adagio; next in slowness to
   grave, which is also weighty and solemn. -- n. A movement
   or piece in largo time.
   [1913 Webster]
WordNet (r) 3.0 (2006):
largo
    adv 1: slowly and broadly
    adj 1: very slow in tempo and broad in manner
    n 1: (music) a composition or passage that is to be performed in
         a slow and dignified manner
Moby Thesaurus II by Grady Ward, 1.0:
55 Moby Thesaurus words for "largo":
   a poco, adagietto, adagio, allargando, allegretto, allegro,
   andante, andante tempo, andantino, beat, calando, compound time,
   crescendo, decrescendo, diminuendo, duple time, forte, fortissimo,
   larghetto, larghissimo, legato, lento, marcando, march tempo,
   mixed times, pianissimo, piano, pizzicato, prestissimo, presto,
   rag, ragtime, rallentando, ritardando, ritenuto, rubato,
   scherzando, scherzo, sextuple time, simple time, spiccato,
   staccato, stretto, syncopation, syncope, tempo, tempo rubato,
   three-quarter time, time, time pattern, timing, triple time,
   triplet, two-four time, waltz time
U.S. Gazetteer Places (2000):
Largo, FL -- U.S. city in Florida
   Population (2000):    69371
   Housing Units (2000): 40261
   Land area (2000):     15.662570 sq. miles (40.565868 sq. km)
   Water area (2000):    0.463335 sq. miles (1.200032 sq. km)
   Total area (2000):    16.125905 sq. miles (41.765900 sq. km)
   FIPS code:            39425
   Located within:       Florida (FL), FIPS 12
   Location:             27.908355 N, 82.777791 W
   ZIP Codes (1990):     34641 34643 34644 34646 34647 34648
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Largo, FL
    Largo
U.S. Gazetteer Places (2000):
Largo, MD -- U.S. Census Designated Place in Maryland
   Population (2000):    8408
   Housing Units (2000): 3709
   Land area (2000):     3.047736 sq. miles (7.893599 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    3.047736 sq. miles (7.893599 sq. km)
   FIPS code:            45825
   Located within:       Maryland (MD), FIPS 24
   Location:             38.876850 N, 76.830651 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Largo, MD
    Largo