The phrase often describes literally not being able to see someone or something anymore. He ran so fast that I quickly lost sight of him.
Pro Tip 2/3
Visibility Factors
This can happen because of distance, obstacles, or environmental conditions like fog or darkness. The ship soon lost sight of the coastline due to the dense fog.
Pro Tip 3/3
Not Literal
Sometimes used metaphorically, meaning losing understanding or awareness of something. As the project continued, we lost sight of the initial customer feedback.