1. Without warning or announcement
   "a totally unheralded telegram that his daughter...died last night"
   - unannounced, unpredicted

See also: unexpected

• Bissau
• bissextile day
• bissextile year
• bistable
• bister
• bistered
• bistort
• bistoury
• bistre
• bistred
• bistro
• bistroic
• bisulcate
• bisulfate
• bisulphate
• bit
• bit field
• bit part
• bit-by-bit
• bitartrate
• bitch
• bitchery
• bitchiness
• bitchy
• bite