Thus, you could have just as easily said that post Brexit, we don't have to accept any new Directives (which would be obvious as we were no longer in the EU). By your own definition, it means the same.
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Directives
A "directive" is a legislative act that
sets out a goal that all EU countries must achieve. However, it is up to the individual countries to devise their own laws on how to reach these goals". One example is the EU consumer rights directive, which strengthens rights for consumers across the EU, for example by eliminating hidden charges and costs on the internet, and extending the period under which consumers can withdraw from a sales contract.
https://europa.eu/european-union/eu-law/legal-acts_en
Which is different from EU regulations.
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Regulations
A "regulation" is a binding legislative act. It must be applied in its entirety across the EU. For example, when the EU wanted to make sure that there are common safeguards on goods imported from outside the EU, the Council adopted a regulation.
https://europa.eu/european-union/eu-law/legal-acts_en
Edit
As JohnD pointed out, if we wanted to trade with EU, post Brexit, we would still have to accept their relevant Regulations, and Directives.