Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  tree tobacco, mustard tree, Nicotiana glauca(noun) evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock.
The symbols of Alpha Phi are outward signs of the high regard and love we have for each other and for Alpha Phi. We treat these symbols with respect by upholding the high ideals and standards which bind Alpha Phi members throughout the world. Alpha Phi Badge.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  alpha(Noun) The name of the first letter of the Greek alphabet (u0391, u03B1), followed by beta. 2  alpha(Noun) Latin alpha. 3  alpha(Noun) The name of the symbols u0391 and u03B1 used in science and mathematics, often interchangeable with the symbols when used as a prefix.