HY Views 10 meanings found HY is a shorthand that can denote a hybrid system in science, a high‑yield investment or crop, a half‑year period in business reporting, informal greetings like “Hey Y’all,” and is also used as a country code for Armenia. Miscellaneous Hai Ying High Yield Hung Yeon Hey Yall Helsingin Yliopisto Community an upcoming actress/ musician from Nigeria Governmental High Yield steel Academic & Science Hybrid Regional Armenian Business Half Year