'Tranquil' definitions:

Definition of 'tranquil'

From: WordNet
adjective
(of a body of water) free from disturbance by heavy waves; "a ribbon of sand between the angry sea and the placid bay"; "the quiet waters of a lagoon"; "a lake of tranquil blue water reflecting a tranquil blue sky"; "a smooth channel crossing"; "scarcely a ripple on the still water"; "unruffled water" [syn: placid, quiet, still, tranquil, smooth, unruffled]
adjective
Not agitated; without losing self-possession; "spoke in a calm voice"; "remained calm throughout the uproar"; "he remained serene in the midst of turbulence"; "a serene expression on her face"; "she became more tranquil"; "tranquil life in the country" [syn: calm, unagitated, serene, tranquil]

Definition of 'Tranquil'

From: GCIDE
  • Tranquil \Tran"quil\, a. [L. tranquillus; probably fr. trans across, over + a word akin to quietus quiet: cf. F. tranquille. See Quiet.] Quiet; calm; undisturbed; peaceful; not agitated; as, the atmosphere is tranquil; the condition of the country is tranquil. [1913 Webster]
  • A style clear, tranquil, easy to follow. --De Quincey. [1913 Webster] Tranquilization