WordWeb Online

1. Causing consternation
   "dismaying conditions"
   - appalling

1. Lower someone's spirits; make downhearted
   "These news dismayed her"
   - depress, deject, cast down, get down, dispirit, demoralize, demoralise [Brit]
    
2. Fill with apprehension or alarm; cause to be unpleasantly surprised
   "I was dismayed at the thought of being late for my interview"
   - alarm, appal [Brit, Cdn], appall [US], horrify

See also: alarming

Type of: affright, discourage, fright, frighten, scare