improvisatorialadj.

1819 G. F. Tytler Life James Crichton iii. 214 Cardinal Silvio Antoniano..in this remarkable talent for improvisatorial versification..affords an interesting example.

1848 Spectator Mar. 3 202/1 To the support of a modern farce he can bring neither the unction of Keeley, the improvisatorial fun of Wright, not the indescribable drollery of Buckstone.

1886 Athenæum 14 Aug. 197/3 Hence, in the deepest and truest sense, Scott, often called the most improvisatorial, is the least improvisatorial of writers.

1922 C. B. Tinker Nature's Simple Plan iii. 85 Such songs are frequently improvisatorial.

1996 Rev. in Amer. Hist. 24 540 The ad hoc, improvisatorial nature of Nixon's Vietnam policies.

2006 Dance Res. 24 149 Taubert offers many more examples of improvisatorial flexibility that would conceivably alter the length of the dance phrase.

1886 M. F. Tupper My Life as Author 385 Those who speak off-hand in prose or verse, ‘inspirationally’ as they call it, but as the outer world prefer to believe, improvisatorially.

1980 R. Gustafson Vivid Air 115 She danced improvisatorially. With, just occasionally, a kicked heel interjected.

2007 Amer. Music 25 25 The slowly permuting terms of Beckett's descriptions were mirrored by electronically processed sounds, guided improvisatorially across specified spatial patterns.