This property refers to languages that mark the specificity of a noun, using either a definite article or affix.  In English, when the speaker refers to a specific noun with which the hearer is familiar, he or she will use a definite article, as in <i>Let's go to <b>the</b> beach</i>.

<br><br><b>Reference</b><br>
Dryer, Matthew S.. 2008. Definite Articles.
In Haspelmath et al (2008), chapter 37.
Available online at <a href="http://wals.info/feature/37">
http://wals.info/feature/37</a href>.

