There are several things seem to be being called ‘Adventure games’:
1) Text only adventure games (I think it’s now PC to call these ‘Interactive fiction

2) Text based adventures with static graphics.
3) Text based adventures with moving graphics.
4) Point-and-click games.
5) Joystick/keyboard based games that have an element of puzzle solving.
Number 5 covers a lot of sins…
My personal definition would probably stop at number three!