uttermost UK /ˈʌtəməʊst/US /ˈʌtəɹmoʊst/adjective 1noun 1forms 1 adjective1 •Extreme; utmost; of the farthest, greatest, or highest degree.They also that dwell in the uttermost parts are afraid at thy tokens: thou makest the outgoings of the morning and evening to rejoice. — 1611 noun1 •The utmost; the highest or greatest degree; the farthest extent.The free way will call for uttermosts in civilization, self-discipline and human excellence. — 1943 formsuttermosts