Meaning of “conditional” - Learner’s Dictionary

conditional

adjective uk us /kənˈdɪʃənəl/
OFFER

If an offer or agreement is conditional, it will only happen if something else is done first:

Their fee is conditional on the work being completed by January.
→ Opposite unconditional
GRAMMAR

A conditional sentence usually begins with 'if' and says that something must be true or happen before something else can be true or happen.

(Definition of “conditional” from the Cambridge Learner’s Dictionary © Cambridge University Press)