head-up display

Short definition from Wiktionary

Noun

1. 1
   A semitransparent graphical and textual display of information projected upon the field of view of a pilot of an aircraft.
2. 2
   A type of radar or electronic chart display where the top of the display always represents the direction the vessel is heading.
3. 3
   A display of score, status, etc. superimposed over the playfield.