Why does the U.S. lag behind our peers when it comes to educating our students?
If girls continue to lag behind in STEM areas, our future economy and competitiveness could suffer.
"fail to keep pace," 1520s, earlier as a noun meaning "last person" (1510s), later also as an adjective (1550s; e.g. lag-mon "last man"), all of uncertain relationship, possibly from a Scandinavian source (cf. Norwegian lagga "go slowly"), or some dialectal version of last, lack, or delay. Related: Lag; lagging. The noun meaning "retardation" is from 1855. First record of lag time is from 1951.
A convict: lags who escape from the county pokey (1930s+ Underworld)
To arrest or imprison a criminal (1940s+ Underworld)