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Definitions

basis

[bey-sis] / ˈbeɪ sɪs /
NOUN
physical foundation
Synonyms
STRONGEST
base footing ground support
STRONG
bed bottom foot groundwork rest seat substructure
WEAK
resting place
Antonyms
STRONG
top
NOUN
foundation for belief, action
Synonyms
STRONGEST
assumption base essential evidence explanation footing fundamental justification premise principle proof reason security support theory
STRONG
antecedent authority axiom backbone background backing bedrock cause center core crux data dictum essence heart infrastructure keynote keystone law nexus nucleus postulate presumption presupposition root rudiment sanction source substratum theorem warrant
WEAK
chief ingredient hard fact principal element underpinning
Antonyms
STRONGEST
auxiliary fact reality trivia
STRONG
effect end exterior exteriority outside periphery result surface

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In a post on Truth Social, Trump said the US had received a 10-point proposal from Iran which he described as "a workable basis on which to negotiate".

From BBC • Apr. 8, 2026

Vessels coming to load up are unlikely to enter via the strait any sooner than a “just in time” logistics basis, “at risk of becoming trapped if hostilities resume.”

From The Wall Street Journal • Apr. 8, 2026

This research helps explain the molecular basis of phosphoric acid's remarkable proton conductivity, often described as "Nature's proton highway."

From Science Daily • Apr. 7, 2026

For comparison, OpenAI said last week that it’s generating $2 billion a month, which “likely implies” that it’s trailing Anthropic on a run-rate basis, according to Jefferies analyst Brent Thill.

From MarketWatch • Apr. 7, 2026

This gave rise to a further dispute as to whether Leibniz had arrived at his theories, as he claimed, independently, or had cobbled them together on the basis of a reading of the Principia.

From "The Invention of Science" by David Wootton