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

See also: unexpected

• ground-hugging
• ground-service crew
• ground-shaker
• groundball
• groundberry
• groundbreaker
• groundbreaking
• groundbreaking ceremony
• groundcover
• grounder
• groundfish
• groundhog
• Groundhog Day
• grounding
• groundkeeper
• groundless
• groundlessly
• groundlessness
• groundling
• groundmass
• groundnut
• groundnut oil
• groundnut vine
• grounds
• groundsel