accessible to likely to be affected by; open to; susceptible to
3.
obtainable; available
4.
easy for disabled people to enter or use
5.
logic (of a possible world) surveyable from some other world so that the truth value of statements about it can be known. A statement possibly p is true in a world W if and only if p is true in some worlds accessible to W
c.1600, "affording access," from Fr. accessible, from L. accessus, from pp. stem of accedere (see access). Meaning "easy to reach" is from 1640s; Of art or writing, "able to be readily understood," 1961 (a term not needed in the years before writing or art often deliberately was made not so).