the world > space > relative position > closed or shut condition > close or shut [verb (transitive)] > close an aperture or orifice > so as to make waterproof, windproof, etc. (3)
(transitive) to fill up gaps or cavities in (a wall, etc.) so as to keep the wind out (cf. filling, n. 2a).
transitive. To make (an enclosure, material, etc.) gas-proof.
transitive, to make weatherproof or impervious to weather.