Seeing a pistachio tree signifies a generous, noble, benevolent person. Pistachios also signify wealth obtained without toil, so eating them signifies easy wealth.
Ibn Sirin says pistachios signify wealth, provision, and blessing; receiving and eating kernels signifies wealth and blessing in proportion to the amount eaten. Salty or bitter pistachios signify provision easily obtained by land or sea. They may also signify that a pregnant woman is close to giving birth.