A fine net, placed around a bed, in a window opening, etc., to provide protection against mosquitoes and other insects, and the diseases carried by them.
1907, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Human Toll (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 127:
Child-trouble widened her brown eyes as she turned them on the shrouded figure stiffly outlined by the sheet, now partly screened by the mosquito-net.
1959, Anthony Burgess, Beds in the East (The Malayan Trilogy), published 1972, page 505:
In the room the mosquito net was down, ghost-grey in the falling light.