What is Access?

Legal Definition
1) In terms of copyright, access refers to the ability of a potential infringer to see or obtain the copyrighted material. Access is important in determining whether a potential infringer has in fact illicitly copied the copyrighted material. If the potential infringer has had no access to the copyrighted material, he can make a strong argument that he could not have copied the copyrighted material, and that any similarities between the allegedly infringing work and the copyrighted work are mere coincidences. However, conversely, access alone is insufficient to establish copyright infringement.

2) In family law the term is used to describe visitation between the child and the non-custodial parent. Depending on the particulars of the visitation arrangement the custodial parent may have limited and/or supervised access.
Legal Definition
Persons. Approach, or the means or power of approaching. Sometimes by access is understood sexual intercourse; at other times the opportunity of communicating together so that sexual intercourse may have taken place, is also called access. 1 Turn. & R. 141.

2. In this sense a man who can readily be in company with his wife, is said to have access to her; and in that case, her issue are presumed to be his issue. But this presumption may be rebutted by positive evidence that no sexual intercourse took place. lb.

3. Parents are not allowed to prove non-access, for the purpose of bastardizing the issue of the wife; nor will their declarations be received after their deaths, to prove the want of access, with a like intent. 1 P. A. Bro. R. App. xlviii.; Rep. tem. Hard. 79; Bull. N. P. 113; Cowp. R. 592; 8 East, R. 203; 11 East, R. 133. 2 Munf. R. 242; 3 Munf. R. 599; 7 N. S. 553; 4 Hayw R. 221, 3 Hawks, R 623 1 Ashm. R. 269; 6 Binn. R. 283; 3 Paige's R. 129; 7 N. S. 548. See Shelf. on Mar. & Div. 711; and Paternity.
-- Bouviers Law Dictionary
Legal Definition
Approach ; or the means, power or opportunity of approaching Sometimes importing the occurrence of sexual intercourse ; otherwise as importing opportunity of communication for that purpose as between husband and wife. In real property law, the term "access" denotes the right vested in the owner of land which adjoins a road or other highway to go and return from his own land to the highway without obstruction. Chicago, etc., R. Co. v. Milwaukee, etc, R. Co., 95 Wis. 561, 70 N. W. 678, 37 L. R. A. 856, 60 Am. St. Rep. 136; Ferguson v. Covington, etc., R Co., 108 Ky. 662, 57 S. W. 460; Reining v. New York, etc., R. Co. (Super. Buff.) 13 N. Y. Supp. 238.
-- Black's Law Dictionary
Legal Definition
Right of way from one’s land to highway.
-- Ballentine's Law Dictionary