Home › Words › G › gastightnessgastightnessgastightness · noun — the quality of being gastight.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom gastight + -ness.nounThe quality of being gastight.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.gastight 77% match — impermeable to gases vs gastightness →airtightness 76% match — The quality of being airtight. vs gastightness →airtight 68% match — Impermeable to air or other gases. vs gastightness →leakproofness 68% match — The quality of being leakproof. vs gastightness →watertightness 66% match — The condition of being watertight vs gastightness →gasproof 65% match — Made of or covered with material that doesn't allow gas in. vs gastightness →gaseosity 65% match — The quality of being gaseous. vs gastightness →gaseity 60% match — The state of being a gas. vs gastightness →