Observed and Undetermined
Opposite meaning words
Observed
Observed adjective - Discovered or determined by scientific observation.
Show all Definitions
Synonyms for Observed
Undetermined is an antonym for observed.
Undetermined
Undetermined adjective - Not yet having been ascertained or determined.
Usage example: of undetermined species
Observed is an antonym for undetermined.
Nearby Word: undeterminable
Cite this Source
Undetermined and Observed. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/observed/undetermined
Observed & Undetermined. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/observed/undetermined>.
Undetermined or Observed. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/observed/undetermined.
Google Ngram Viewer shows how "observed" and "undetermined" have occurred on timeline