The document defines the word "tentatively" as meaning not final or fully worked out. As an example, it provides the sentence "The meeting is tentatively scheduled for Monday, but we may not need to have one." It also lists antonyms of the word as "planned, scheduled, definite" and synonyms as "unconfirmed, indefinite, uncertain."

1.  Definition: not final; not fully worked out
 Sentence: The meeting is tentatively scheduled for
Monday, but we may not need to have one.
Antonyms: planned,
scheduled, definite
SYNONYMS: unconfirmed;
indefinite, uncertain