Flagship Program. The Flagship Program is a series of NASA missions to explore the Solar System. It is the largest and most expensive of three classes of NASA Solar System Programs, the other two being the medium-cost New Frontiers Program and the lowest-cost Discovery Program. According to NASA, the cost of a Flagship-class mission is over $1 billion. These missions will be crucial in allowing humans to reach and explore high-priority targets. These critically important targets could help establish the limits of
not flammable; not combustible or easily set on fire. Origin of nonflammable. 1960-1965. First recorded in 1960-65; non- + flammable.
Flammable gas-means a gas having a flammable range with air at 20Â°C and a standard pressure of101.3kPa. Flammable liquid-means a liquid having a flash point of not more than 93Â°C. Flammable solid-means a solid which is readily combustible, or may cause or contribute to fire through friction.