The distinction made by Coleridge between Fancy and the Imagination rested on the fact that Fancy was concerned with the mechanical operations of the mind, those which are responsible for the passive accumulation of data and the storage of such data in the memory. Imagination, on the other hand, described the "mysterious power," which extracted from such data, "hidden ideas and meaning." It also determined "the various operations of constructive and inventive genius."
Engell has demonstrated that Coleridge's division of the imagination into the "primary" and "secondary" draws a distinction between creative acts that are unconscious and those that are intentional and deliberate. "The Primary Imagination" was for Coleridge, the "necessary imagination" as it "automatically balances and fuses the innate capacities and powers of the mind with the external presence of the objective world that the mind receives through the senses." It represents man's ability to learn from nature. The over arching property of the primary imagination was that it was common to all people. The Secondary imagination, on the other hand, represents a superior faculty which could only be associated with artistic genius. It was this aspect of the imagination, one which could break down what was perceived in order to recreate by an autonomous willful act of the mind that has no analog in the natural world—which Coleridge associated with art and poetry. A key and defining attribute of the secondary imagination was a free and deliberate will; "superior voluntary controul. . .co-existing with the conscious will." The secondary imagination, once activated by the will, "dissolves, dissipates in order to recreate."And...
Coleridge explained this property of the "Imagination" as "ESEMPLASTIC," to "shape into one" and to "convey a new sense." Coleridge in the tenth chapter of Biographia Literaria described this ability of the imagination as "Esemplastic." Noting that esemplastic was a word he borrowed from the Greek "to shape," Coleridge explained that it referred to the imagination's ability to "shape into one, having to convey a new sense." He felt such a term was necessary as "it would aid the recollection of my meaning and prevent it being confounded with the usual import of the word imagination." Biographia Literaria, vol. 1, p. 86
If you really want to use a pretentious-sounding term, try esemplastic. Derived from Greek words meaning "into" and "one" and "mold," and coined by Coleridge in 1817, the word means "having the function of molding into unity; unifying." The picture derived from the word is of someone, probably a poet, taking images and words and feelings from a number of realms of human endeavor and thought and bringing them all together into a poem s/he writes. This requires a huge effort of the imagination, which we might call the "esemplastic power of the poetic imagination." A decade after its first appearance a writer could remark, "Nor I trust will Coleridge's favorite word esemplastic..ever become current."
Not only did the subject subsume the object it can also be argued that Imagination subsumed the role of Fancy within the creative work. Thus while Coleridge argued that the poet relied on both Fancy and Imagination when inventing a poem, and that the poet should seek a balance of these two faculties, (Coleridge, Biographia Literari, vol 1, p. 194) the "active" and "transformative" powers of the Imagination negated the contribution of, and representation of Fancy. In Coleridge's system, the Imagination is ultimately the only faculty which contributed to the creative process.