noun
telltale
TEHL-tayl
noun
1
Something that gives away or reveals a fact, often one meant to stay hidden.
"The telltale smell of smoke gave away where he'd been hiding."
2
A warning light or indicator that signals a problem.
"The dashboard telltale lit up as soon as the oil ran low."
adj
1
Revealing something that was meant to be concealed.
"She noticed the telltale crumbs on his shirt."
How to Use Telltale
Learner’s notesIn plain EnglishSomething (a sign, mark, or light) that gives away a secret or warns of a problem.
Common pairings
telltale sign
telltale light
Word Forms
more telltale comparative, telltales plural, most telltale superlative
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The _____ smell of smoke gave away where he'd been hiding.
Etymology
From tell plus tale, likely reshaped from an earlier form of "tale-teller."