Develop

de-vel'up, v. [-oped (-upt), -oping.] To free from a cover or envelope, disclose or make known, unfold gradually, exhibit, detect. (Math.) To change the form of (an algebraic expre ion) by executing indicated operations without changing the value. (Photog.) To render (a picture) visible by subjecting to chemical action. — v. To go through a natural evolution, by succe ive changes to a more perfect state; to become visible gradually. [F. de'velopper, f de and F. enveloper, E. to wrap, lap.] — Development, n. Act of, etc. (Math.) Act of expanding an expre ion into another of equivalent meaning; the equivalent expre ion into which another has been developed. — Development theory. (Nat. Hist.) Doctrine that all existing forms of matter and spirit were developed by uniform laws from simpler forms, without creative act.