wrapper

noun

1. Something that is wrapped around something else as a cover or protection: a wrapping.

   “Messy trains are horrible, but you can sort of understand passengers leaving their sandwich wrappers and paper cups if there is nowhere to dispose of them.”

2. An outer garment; a loose robe or dressing gown.

   “Please to examine, at your leisure, the inner linings of the cuff of his left sleeve, and the several little packages which may be found in the somewhat capacious pockets of his embroidered morning wrapper.”

   “It was eight o'clock to-morrow evening when I buckled up my travelling writing-desk in its leather case, paid my Bill, and got on my warm coats and wrappers.”

3. One who, or that which, wraps.

   “He proved to be a remarkably efficient wrapper of parcels.”

4. A construct, such as a class or module, that serves to mediate access to another.

   “We need a Perl wrapper for this C++ library.”

5. (derogatory)A startup company that sells technology that it largely does not make.