The noun BETEL NUT has 1 sense: 1. seed of betel palm; chewed with leaves of the betel pepper and lime as a digestive stimulant and narcotic in southeastern Asia.Familiarity information: BETEL NUT used as a noun is very rare.eed of betel palm; chewed with leaves of the betel pepper and lime as a digestive stimulant and narcotic in southeastern Asia.
Princeton's WordNet(2.67 / 3 votes)Rate this definition: 1  repose, quiet, placidity, serenity, tranquillity, tranquility(noun) a disposition free from stress or emotion. 2  tranquillity, tranquility, quiet(noun) an untroubled state; free from disturbances. 3  tranquillity, tranquility, quietness, quietude(noun) a state of peace and quiet.
A: Ensuring domestic tranquility involves keeping the peace within the nation. It means preventing domestic terrorism at the hands of citizens and outsiders and controlling rebellious behavior that threatens to undermine national security.