Definition of res non verba in US English:

res non verba

noun

  • ‘Things not words’; concrete fact or action as opposed to mere talk. Sometimes as noun (with plural or singular concord).

Origin

Early 19th century; earliest use found in The Universal Magazine. From classical Latin rēs non verba things not words (Livy) from rēs, plural of rēs thing + nōn not + verba, plural of verbum word.