1. Something that checks the correctness of a previous check
   "He always did a double check of his calculations before submitting his work";
   - countercheck

1. Check once more to be absolutely sure
   "The problem is that these members may not double-check facts"

Derived forms: double-checking, double-checks, double-checked, double checks

Type of: ascertain, assay, check, ensure, insure, make certain, make sure, see

Encyclopedia: Double check