directive
US /daɪˈrek.tɪv/
UK /daɪˈrek.tɪv/

1.
an official or authoritative instruction
:
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The manager issued a directive to all employees regarding the new policy.
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The government's new directive aims to reduce carbon emissions.
1.
of or relating to direction or guidance
:
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The new software has a more directive interface, guiding users step-by-step.
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His leadership style is very directive, leaving little room for individual initiative.