LAG, adjective [This word belongs to the root of slack, slow, sluggish, languish, long; Gr. See the Verb.] 1. Coming after or behind; slow; sluggish; tardy. 2. Last; long delayed; as the lag end. [This adjective is not now in use.] LAG, noun 1. The lowest class; the rump; the fag end. 2. He that comes behind. [Not in use.] LAG, verb intransitive [Eng. to flag, and flacceo, langueo, to languish, etc. The sense is to extend or draw out, or to become lax or loose.] To walk or move slowly; to loiter; to stay behind. I shall not lag behind.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI