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Definitions

flat-footed

ADJECTIVE
off-guard
Synonyms
WEAK
asleep asleep on the job daydreaming inattentive napping spaced out unalert unready unsuspecting unvigilant unwatchful zoned out
ADVERB
off-guard
Synonyms
WEAK
asleep asleep at the switch derelict napping negligent not on the job unalert unguarded unprepared unready unwatchful

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.

Unable to trap West Ham with a high press, United were caught flat-footed by an incisive break.

From Barron's • Feb. 10, 2026

Caught flat-footed by the success of that video app, then owned by ByteDance, Instagram launched Reels in August 2020.

From The Wall Street Journal • Jan. 1, 2026

They were flat and flat-footed from the beginning, surrendering a 75-yard touchdown pass on Houston’s first possession and a 43-yard touchdown pass on the second.

From Los Angeles Times • Dec. 27, 2025

Caught flat-footed by 9/11, the CIA requested new authorities as the only way to catch up to the threat.

From The Wall Street Journal • Nov. 4, 2025

He was short and old, with a white mustache and walked flat-footed with a cane.

From "A Farewell To Arms" by Ernest Hemingway