"Zeroing in" is a term used to describe the act of focusing or targeting on a specific objective or goal. There are several synonyms for this phrase, such as narrowing down, honing in, pinpointing, locking on, and zoning in. These words all describe the process of eliminating distractions and honing in on a specific task or target. They are often used in professional settings, such as business or military operations, but can also be applied to personal pursuits and hobbies. Whatever the context may be, using synonyms for "zeroing in" can help to convey a sense of precision, determination, and clarity of purpose.