from The American Heritage® Dictionary of the English Language, 4th Edition
- n.pl. A period of stagnation or slump.
- n.pl. A period of depression or unhappy listlessness.
- n.pl. A region of the ocean near the equator, characterized by calms, light winds, or squalls.
- n.pl. The weather conditions characteristic of these regions of the ocean.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. 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
- n. the state of boredom, malaise, apathy or lack of interest; a state of listlessness ennui, or tedium
from the GNU version of the Collaborative International Dictionary of English
- n.pl. 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.
from The Century Dictionary and Cyclopedia
- Low spirits; the dumps: as, he is in the doldrums.
- Nautical, certain parts of the ocean near the equator that a bound in calms, squalls, and light baffling winds; also, the calms or variations of weather characteristic of those parts.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a belt of calms and light winds between the northern and southern trade winds of the Atlantic and Pacific
- n. a state of inactivity (in business or art etc)
From obsolete doldrum, dullard, alteration (influenced by tantrum) of Middle English dold, past participle of dullen, to dull, from dul, dull; see dull.(American Heritage® Dictionary of the English Language, Fourth Edition)
Goidelic doltrum ("grief, vexation") (Wiktionary)