Certify

1. v. t. To testify to in writing; to make a declaration concerning, in writing, under hand, or hand and seal.
2. v. t. To give cetain information to; to assure; to make certain.
3. v. t. To give certain information of; to make certain, as a fact; to verify.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.