1) ADJ-GRADED: ADJ n A selective process applies only to a few things or people.

Selective breeding may result in a greyhound running faster and seeing better than a wolf.

...selective education.

Derived words:
selectively ADV usu ADV with v

Within the project, trees are selectively cut on a 25-year rotation.

selectivity [[t]sɪle̱ktɪ̱vɪti[/t]] N-UNCOUNT usu with supp

The soldiers specialized in going out in small groups, to kill with a very high degree of selectivity.

2) ADJ-GRADED: usu v-link ADJ When someone is selective, they choose things carefully, for example the things that they buy or do.

Sales still happen, but buyers are more selective...

If public figures seek publicity to further their careers, they can't be selective about it.

Derived words:
selectively ADV-GRADED ADV with v

...people on small incomes who wanted to shop selectively.

3) ADJ-GRADED: usu ADJ n (disapproval) If you say that someone has a selective memory, you disapprove of the fact that they remember certain facts about something and deliberately forget others, often because it is convenient for them to do so.

We seem to have a selective memory for the best bits of the past...

Mr Robins, suffering from selective amnesia about his role in the affair, was contradicted in nearly every instance by other witnesses.

Derived words:
selectively ADV-GRADED ADV with v

...a tendency to remember only the pleasurable effects of the drug and selectively forget all the adverse effects.

English dictionary. 2008.