1. Having momentous consequences; of decisive importance
   "that fateful meeting of the U.N. when...it declared war on North Korea"
   - fatal 
2. Ominously prophetic
   - foreboding, portentous 
3. (of events) having extremely unfortunate or dire consequences; bringing ruin
   "a fateful error"
   - black, calamitous, disastrous, fatal 
4. Controlled or decreed by fate; predetermined
   - fatal

See also: decisive, fatefully, inevitable, prophetic, prophetical, unfortunate

• mechanical phenomenon
• mechanical piano
• mechanical press
• mechanical system
• mechanically
• mechanically skillful
• mechanician
• mechanics
• mechanisation
• mechanise
• mechanised
• mechanised cavalry
• mechanism
• mechanist
• mechanistic
• mechanistically
• mechanization
• mechanize
• mechanized
• mechanized cavalry
• Mechlin
• Mechlin lace
• Mecholyl
• Meckel's diverticulum
• meclizine