From Longman Dictionary of Contemporary Englishbonsaibon‧sai /ˈbɒnsaɪ, ˈbəʊn- $ bɒːnˈsaɪ, ˈbɑːnsaɪ/ noun [countable, uncountable] 
HBPa tree that is grown so that it always stays very small, or the art of growing trees in this way —bonsai adjective
HBPa tree that is grown so that it always stays very small, or the art of growing trees in this way —bonsai adjectiveExamples from the Corpus
bonsai• I came first to the Flat Garden, with its bonsai azaleas, temple statuary, and a stunning view of Portland.Origin bonsai (1900-2000) Japanese “tray planting” 