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v. pre·ex·ist·ed, pre·ex·ist·ing, pre·ex·ists
To exist before (something); precede: Dinosaurs preexisted humans.
To exist beforehand.

pre′ex·is′tence n.
pre′ex·is′tent adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.preexistent - existing previously or before something; "variations on pre-existent musical themes"
antecedent - preceding in time or order
References in classic literature ?
I must stop, captain; no one can describe the woman he loves save very imperfectly, preexistent mysteries which defy analysis lie between them.
I think, in some preexistent state, he must have been in the higher circles of spirits, and brought all his old court pride along with him; for it was ingrain, bred in the bone, though he was originally of poor and not in any way of noble family.
However, when there is a preexistent pneumothorax, the adequate use of HFJV probably helps to reduce the air leak through the bronchopleural fistula because a lower elevation in the airway pressure, associated with a good compromise on the oxygenation.
Secondary skin tumors can develop on preexistent NC, which are usually benign, but malignant neoplasias were also reported in this setting [3, 6].
Both the native radiographs and the computed tomography showed a preexistent scaphotrapezotrapezoidal (STT) arthritis and the configuration of static dorsally intercalated segmental instability (DISI) (Figures 1(a)-1(c)).
Jesus is the self-existent, preexistent, omnipotent, eternal, Creator God.
He taught that God made all things out of nothing and rejected the notion of uncreated, preexistent matter as in Hellenic philosophy.
Similarly, Brandie Siegfried's "God and the Question of Sense Perception in the Works of Margaret Cavendish" approaches these subjects, noting "Cavendish believed Nature to be infinite and agential, made up of preexistent matter; matter, in turn, is both rational and sensitive; and finally, the world as we know it emerged from a mutual regard between God and nature" (67).
History revealed preexistent cryptogenic cirrhosis and mild preeclampsia, on treatment with oral Nifedipine and Methyldopa.
Vermes has to work hard to make the evidence for this development go away--for example, by never discussing accounts of the resurrection and by claiming that the famous hymn to the preexistent Christ in Paul's Letter to the Philippians was added in the second century (108-110).
Moreover, it may occur in the setting of preexistent osteoarthritis, rheumatoid arthritis, osteonecrosis, osteochondritis dissecans, neuropathic osteoarthropathy, tuberculosis, or osteochondral fractures.
The church's liturgical calendar celebrates the triumphant entry of Jesus into Jerusalem on Palm Sunday--a Christian adaptation of a preexistent practice.