A continent is any of several large geographical regions. Continents are generally identified by convention rather than any strict criteria. A continent could be a single landmass or a part of a very large landmass, as in the case of Asia or Europe. Due to this, the number of continents varies; up to seven or as few as four geographical regions are commonly regarded as continents. Most English-speaking countries recognize seven regions as continents. In order from largest to smallest in area, these seven regions are Asia, Africa, North America, South America, Antarctica, Europe, and Australia. Different variations with fewer continents merge some of these regions; examples of this are merging North America and South America into America, Asia and Europe into Eurasia, and Africa, Asia, and Europe into Afro-Eurasia.

उपमहाद्वीप एक महाद्वीप के भीतर एक बड़े, अपेक्षाकृत घुन्ना भूभाग है। शब्दकोश प्रविष्टियों के अनुसार उपमहाद्वीप को महाद्वीप के बाकी हिस्सों से एक निश्चित भौगोलिक या राजनीतिक स्वतंत्रता होती है।वाक्यांश "उपमहाद्वीप" आमतौर पर भारतीय उपमहाद्वीप को संदर्भित करता है, जिसमें भारत, पाकिस्तान, बांग्लादेश, नेपाल, भूटान, मालदीव और श्रीलंका शामिल है। इसमें कभी-कभी अफगानिस्तान को भी शामिल किया जाता है।