Definitions

plain as day

ADJECTIVE

evident

Synonyms

STRONGEST

conspicuous indisputable noticeable obvious palpable unmistakable visible

WEAK

axiomatic barefaced clear-cut crystal clear distinct fact incontestable incontrovertible logical manifest open and shut patent perceptible plain reasonable straightforward tangible unambiguous

Antonyms

STRONGEST

concealed doubtful dubious hidden inconspicuous indefinite obscure questionable uncertain unclear unnoticeable unsure vague

WEAK

disputable mistakable secret unknown

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.

This should be plain as day to anyone who cares to look and listen.

From Slate • Jan. 20, 2026

But here it is, plain as day and I’m angry about it.

From Salon • May 15, 2025

Baker pushes the comedy, but, just as with Ani, the injustice of it all is plain as day.

From Los Angeles Times • Oct. 16, 2024

A nest box has been installed on the girder, and the Peregrine is sitting in it, plain as day.

From Scientific American • Sep. 15, 2021

That’s what his look said to her, as plain as day.

From "Miracles on Maple Hill" by Virginia Sorensen