Definitions:

1. Refers to the quality or state of being ulterior. NOUN
   • His constant flattery seemed to hint a deeper ulteriority, making me question his true intentions.
2. Signifies the presence of motives or intentions that are kept secret, often suggesting that there is something more beyond what is openly expressed. NOUN
   • The teacher's seemingly helpful nature masked an ulteriority to control her students.

Synonyms:

• concealed plan
• covert objective
• hidden agenda
• hidden intentions
• secret motive