[intransitive, transitive] to die because there is no air to breathe; to kill someone by not letting them breathe air Many dogs have suffocated in hot cars. suffocate somebody/something The couple were suffocated by fumes from a faulty gas heater. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.