'Seventeen' definitions:

Definition of 'seventeen'

adjective

Being one more than sixteen [syn: seventeen, 17, xvii]

noun

The cardinal number that is the sum of sixteen and one [syn: seventeen, 17, XVII]

From: GCIDE

Seventeen \Sev"en*teen`\, a. [OE. seventene, AS. seofont[=y]ne, i. e., seven-ten. Cf. Seventy.] One more than sixteen; ten and seven added; as, seventeen years. [1913 Webster]

From: GCIDE

Seventeen \Sev"en*teen`\, n.
1. The number greater by one than sixteen; the sum of ten and seven; seventeen units or objects. [1913 Webster]
2. A symbol denoting seventeen units, as 17, or xvii. [1913 Webster]