"Lifetime" refers to the duration of time that an individual or object exists. In biological terms, it often describes the span from birth to death for living organisms, including humans, animals, and plants. Factors such as genetics, environment, and lifestyle can influence the length of a lifetime. In a broader context, "lifetime" can also apply to products or services, indicating the period during which they remain functional or relevant. For example, the lifetime warranty of a product guarantees its repair or replacement for a specified duration, ensuring customer satisfaction and trust in the brand.