V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry अपसार
अपसारapasāra1 Going out, retreating.
1 Going out, retreating.
An outlet, egress (Opposite ofप्रवेश); Pt.3.12. अनपसारमार्गाः Dk.163; H.3.53; Śi.18.4.