Final answer:
The word 'import' is best defined as obtaining a product from another country. Governments use tariffs and trade barriers to influence imports for economic, environmental, and security reasons.
Step-by-step explanation:
The term import refers to the act of obtaining a product from another country. Therefore, the best definition of the word import from the given options is B: To obtain a product from another country. Imports can significantly affect a country's economy, and various trade policies and governmental measures such as tariffs and trade barriers can be implemented to either encourage or discourage imports. Additionally, environmental concerns and national security can influence a government to restrict imports to protect its national interests.