Noah Webster's New International Dictionary of the English Language
1. (v. t.) To put together so as to make one; to join, as two or more constituents, to form a whole; to combine; to connect; to join; to cause to adhere; as, to unite bricks by mortar; to unite iron bars by welding; to unite two armies.
2. (v. t.) Hence, to join by a legal or moral bond, as families by marriage, nations by treaty, men by opinions; to join in interest, affection, fellowship, or the like; to cause to agree; to harmonize; to associate; to attach.
3. (v. i.) To become one; to be cemented or consolidated; to combine, as by adhesion or mixture; to coalesce; to grow together.
4. (v. i.) To join in an act; to concur; to act in concert; as, all parties united in signing the petition.
5. (v. t.) United; joint; as, unite consent.