The phrase "catching a glimpse of" suggests a fleeting or brief moment of seeing something or someone. Its antonyms could be related to more extended or prolonged observations, such as "staring at," "gazing upon," or "scrutinizing." Conversely, antonyms can also refer to missing out on seeing something or someone, including "ignoring," "overlooking," or "neglecting." Other antonyms could include "avoiding," "evading," or "escaping," which indicate deliberate actions to stay away from a certain sight or image. Overall, the antonyms of "catching a glimpse of" connote a more deliberate, continuous, or committed viewing experience, or the opposite of observing altogether.