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â¢ OVERHAND KNOT (noun). The noun OVERHAND KNOT has 1 sense: 1. a simple small knot (often used as part of other knots). Familiarity information: OVERHAND KNOT used as a noun is very rare.
Black knot is a disease that is most severe on cultivated crops in orchard and ornamental planting situations. Black knot appears to be a minor problem on Prunus species found in forest situations, where susceptible trees are surrounded by many nonsusceptible species of trees.