When conversation lagged, they apparently took the hint and retreated into Bird Song.
In some experiments the bar was lagged with i in.
Thus Arcadia lagged behind the general development of Greece, and its political importance was small owing to chronic feuds between the townships (notably between Mantineia and Tegea) and the readiness of its youth for mercenary service abroad.
The polar regions travelled a little from west to east relatively to the equatorial, which lagged behind.
The 17th century is a famous epoch in the progress of science, and the mathematics in no way lagged behind.