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Webster 1913 Edition
doldrums
dol′drums
(dŏl′drŭmz)
, Noun.
pl.
[Cf. Gael.
doltrum
grief, vexation?] A part of the ocean near the equator, abounding in calms, squalls, and light, baffling winds, which sometimes prevent all progress for weeks; – so called by sailors.
To be in the doldrums
, to be in a state of listlessness ennui, or tedium.