WordWeb Online

1. Reverse the winding or twisting of
   "unroll a ball of yarn";
   - unwind, wind off, unspool
    
2. Unroll, unfold, or spread out or be unrolled, unfolded, or spread out from a furled state
   "unroll a banner";
   - unfurl

Derived forms: unrolls, unrolled, unrolling

Type of: change surface, displace, move

Antonym: roll up