a. [ L. gypseus. See Gypsum. ] Resembling or containing gypsum; partaking of the qualities of gypsum. [ 1913 Webster ]
a. [ From Gas. Cf. F. gazeux. ] 1. In the form, or of the nature, of gas, or of an aëriform fluid. [ 1913 Webster ]
2. Lacking substance or solidity; tenuous. “Unconnected, gaseous information.” Sir J. Stephen. [ 1913 Webster ]