Meaning : Attach (oneself) to a person or thing in a neurotic way.
Example :
He fixates on his mother, even at the age of 40.
Meaning : Pay attention to exclusively and obsessively.
Example :
The media are fixating on Princess Diana's death.
Meaning : Make fixed, stable or stationary.
Example :
Let's fix the picture to the frame.
Synonyms : fix
Meaning : Become fixed (on).
Example :
Her eyes fixated on a point on the horizon.
Synonyms : settle on