to disclose or reveal (something private, secret, or previously unknown).
Origin: 1425–75; late Middle English (< Anglo-French ) < Latin dīvulgāre, equivalent to dī-di-2 + vulgāre to make general or common, to spread (vulg(us) the masses + -āre infinitive suffix)
mid-15c., from L. divulgare "publish, make common," from dis- "apart" + vulgare "make common property," from vulgus "common people" (see vulgar). Related: Divulged; divulging.