1. thro - Adjective
2. thro - Preposition
thro
(archaic) through
(obsolete) Eager; earnest; vehement.
(obsolete) Bold.
Source: en.wiktionary.orgThe crowd assembled just before 2 p.m. outside the airport's upper-deck departure area, marched thro. Source: Internet
Three weeks later, the typesetting was almost done, as he announced to Bentley on 20 July: "I am now passing thro' the press, the closing sheets of my new work". Source: Internet
SW Track program starts May 29YELLOW SPRINGS — The Southwest Ohio Track and Field team will begin its 2018 season May 29, and will continue thro. Source: Internet
For man has closed himself up, till he sees all things thro' narrow chinks of his cavern. Source: Internet