Douglas Harper's Etymology Dictionary
1815, from composition + -al (1).
Wiktionary
a. 1 Of or pertaining to composition. 2 (context linguistics English) Being the sum of its parts.
WordNet
adj. arranging or grouping
Usage examples of "compositional".
For beyond the compositional links between the art of music and the art of the novel explored in the essay, beyond the esthetic testaments of artists such as Stravinski, Kafka, Janacek, Gombrowicz, Beckett, Hemingway, Fuentes, Sollers or Rushdie, Kundera reveals a much larger betrayal.
A fleet of the little robot prospecting craft had been amassing compositional data on the Apollo Amour asteroids for nearly a decade.
Trying to quantify or contextualize the value of any given motion picture, attempting to link movies to what is happening in the world outside those dark, still rooms where something other than an immediate compositional punch, however stylish and not boring should be the sought chalice, becomes an exercise in profound and introspective musing.
On the desk was the framed photograph of Lown and Bolin formally posed on a small lawn on some campus somewhere, each half turned toward the camera and half facing the other, hands behind backs, Edna's left leg extended a bit, Lester's right leg likewise set forward, a large and not very interesting jug positioned evenly between the standing figures (solely for compositional effect, it was clear), the artificial dignity of the picture enhanced by the fading gray tones and the shopworn frame.