C2[C or U]the fact of a feeling, state, or characteristic being strong, extreme, or detailed: He spoke with great depth of feeling.I was amazed at the depth of her knowledge.Power and intensityEnergy, force and powerin the depth(s) of sth›experiencing an extreme and negative emotion: He was in the depths of despair/depression about losing his job.Experiencing and suffering›during the worst period of a bad situation: The company was started in the depth of the recession of the 1930s.Serious and unpleasantNot attractive to look atInformal words for badSpecific periods of time