From The Collaborative International Dictionary of English v.0.48:
Unite \U*nite"\, a. [L. unitus, p. p. See Unite, v. t.] United; joint; as, unite consent. [Obs.] --J. Webster. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Unite \U*nite"\, v. t. [imp. & p. p. United; p. pr. & vb. n. Uniting.] [L. unitus, p. p. of unire to unite, from unus one. See One.] 1. 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. [1913 Webster]
2. 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. [1913 Webster]
Under his great vicegerent reign abide, United as one individual soul. --Milton. [1913 Webster]
The king proposed nothing more than to unite his kingdom in one form of worship. --Clarendon. [1913 Webster]
Syn: To add; join; annex; attach. See Add. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Unite \U*nite"\, v. i. 1. To become one; to be cemented or consolidated; to combine, as by adhesion or mixture; to coalesce; to grow together. [1913 Webster]
2. To join in an act; to concur; to act in concert; as, all parties united in signing the petition. [1913 Webster]