Webster’s Revised Unabridged Dictionary · 1913 Sillyhow Sil′ly·how (·hou), n. [Prov. E. silly-hew; cf. AS. sǣlig happy, good, and hūfe a cap, hood. See Silly, a.] A caul. See Caul, n., 3. [Obs. or Prov. Eng. & Scot.] ‹ Silly Silo ›