Simple past tense and past participle of lag.(verb)
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Use "lagged" in a sentence
"Yet times have changed, and Dowling acknowledges the arts economy is suffering from what he calls the lagged recession -- where the effects are only really now being felt, and are likely to linger for some time."
"Republican nominee-presumptive John McCain lagged far behind, in third place with $25,130 in college contributions."
"Britain lagged behind on key measures of poverty and deprivation, happiness, relationships, and risky or bad behavior, the study showed."