उपासना परमात्मा की प्राप्ति का साधनविशेष। 'उपासना' का शब्दार्थ है - 'अपने इष्टदेवता की समीप (उप) स्थिति या बैठना (आसन)'। आचार्य शंकर की व्याख्या के अनुसार 'उपास्य वस्तु को शास्त्रोक्त विधि से बुद्धि का विषय बनाकर, उसके समीप पहुँचकर, तैलधारा के सदृश समानवृत्तियों के प्रवाह से दीर्घकाल तक उसमें स्थिर रहने को उपासना कहते हैं' ।

Worship is showing regard with great respect, honor, or devotion. This may be encountered in religious settings. In such instances it may represent divine worship; reverence for a divine being or supernatural power. This activity may have other focuses, such as hero worship. Worship may involve one or more of activities such as veneration, adoration, praise, supplication, devotion, prostration, or submission. An act of worship can be performed as simple prayer or through elaborate ceremony, individually, in an informal or formal group, or by a designated leader. The focus of worship is ultimately honoring the subject in some manner.