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.