bear in on

bear in on (third-person singular simple present bears in on, present participle bearing in on, simple past bore in on, past participle borne in on)

1. Alternative form of bear in upon
2. (of a horse) To veer too close to another horse.
3. (transitive) To be greatly affected by something potent.

   These problems having been bearing in on my mind for years.

4. (transitive) To focus on; to concentrate on one factor.