The Collaborative International Dictionary of English v.0.48:

Singhalese \Sin`gha*lese"\, n. & a. [Skr. Si[mtil]hala Ceylon.]
   (Ethnol.)
   Same as Cingalese.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cingalese \Cin`ga*lese"\, n. sing. & pl. [Cf. F. Cingalais.]
   A native or natives of Ceylon descended from its primitive
   inhabitants; also (sing.), the language of the Cingalese. --
   a. Of or pertaining to the Cingalese. [Written also
   Singhalese.]
   [1913 Webster]

   Note: Ceylonese is applied to the inhabitants of the island
         in general.
         [1913 Webster]

WordNet (r) 3.0 (2006):

Singhalese
    adj 1: of or relating to the Sinhalese languages; "the Sinhalese
           versions of the Ramayana" [syn: Sinhala, Singhalese,
           Sinhalese]
    2: of or relating to the Sinhalese people; "Sinhalese rebels
       fighting the Tamils" [syn: Singhalese, Sinhalese]
    n 1: a native or inhabitant of Sri Lanka [syn: Sinhalese,
         Singhalese]
    2: the Indic language spoken by the people of Sri Lanka [syn:
       Sinhalese, Singhalese, Sinhala]