A table is in second normal form (2NF) if and only if it is in 1NF and every nonkey attribute is fully dependent on the primary key. An attribute is fully dependent on the primary key if it is on the right side of an FD for which the left side is either the primary key itself or something that can be derived from the primary key using the transitivity of FDs.
An example of a transitive FD in report is the following:
report_no -> dept_no
dept_no -> dept_name
Therefore we can derive the FD (report_no -> dept_name), since dept_name is transitively dependent on report_no.