Entry Word: dubious

Function: adjective

Meaning: 1 giving good reason for being doubted, questioned, or challenged <any letter bearing the signature of Samoset would be of dubious authenticity, to say the least> — see doubtful 2
2 having doubts about the wisdom of doing something <Iʼm dubious about our plan to go hang gliding without having had any training> — see hesitant
3 not likely to be true or to occur <made the dubious claim of being of royal blood> — see improbable
4 not feeling sure about the truth, wisdom, or trustworthiness of someone or something <dubious about a diet that claims I can eat all I want and still lose weight> — see doubtful 1