From Longman Dictionary of Contemporary Englishhome in on something phrasal verb1 TOWARDSto aim exactly at an object or place and move directly to it The bat can home in on insects using a kind of ‘radar’.2 ATTENTIONto direct your efforts or attention towards a particular fault or problem He homed in on the one weak link in the argument. → home→ See Verb table
Examples from the Corpus
home in on • It can home in on a car from almost half a mile away.• Eyes as dark as night homed in on her own.• Some weapons home in on infra-red sources, some on radar, others just go where they are told.• Using both taste and smell, sharks can home in on ounces of blood diffused in the sea.• They live mainly on berries and fruit, so they tend to home in on people's gardens.• Sue Morris of W H Smith homed in on the primary source of the information - the consumer.• As her work homed in on the truth of her circumstances, Margarett became more vulnerable.• It sounds, once again, as though evolution deals in distant targets, homing in on things like scorpions. 