n. 4. Informal. Indomitable spirit. Pluck.
n. 1. A vessel made of a refractory substance such as graphite or porcelain, used for melting and calcining materials at high temperatures. 2. A severe test, as of belief.
n. Slang. 1. The ability to face difficulty with spirit and courage. 2. Aggressive energy; initiative. 3. Skill; know-how.