adv

• (dated) At large; widely; broadly; over a wide space.
  "A tree spreads its branches abroad."
• (dated) Without a certain confine; outside the house; away from one's abode.
  "I went to St. James', where another was preaching in the court abroad."
• (dated) Before the public at large; throughout society or the world; here and there; moving without restriction.
  "This Peece, or Schisme of Suicisme, and Selfishnesse, hath spawned most of the Heresies and Schismes, that are abroad in the World."
• (sports) Played elsewhere than one's home grounds.

noun

• (rare, Scotland) Countries or lands abroad.
  "I hate abroad, abroad’s bloody."

adj

• (nonstandard, chiefly non-native speakers' English) International.
  "[...] much shorter than an abroad trip at eight nights although the average spending per person night is only slightly less on a US trip than an abroad trip, $37 compared with $41. Around half of Canadian trips to other countries are to Europe."