'Flagstone' definitions:

Definition of 'flagstone'

From: WordNet
noun
Stratified stone that splits into pieces suitable as paving stones [syn: flag, flagstone]

Definition of 'Flagstone'

From: GCIDE
  • Flagstone \Flag"stone`\, n. A flat stone used in paving, or any rock which will split into such stones. See Flag, a stone. [1913 Webster]