Additionally, because the children showed a uniformly similar order of. acquisition of this knowledge, it was concluded that a hierarchy for. reading readiness exists and can serve as a basis for definition, testing, and instruction.
LINK / CITE ADD TO WORD LIST. verb. The definition of lessen is to diminish or to cause something to be diminished or reduced. When you take pain pills and they reduce pain, this is an example of a situation where the pills lessen the pain.erb. The definition of lessen is to diminish or to cause something to be diminished or reduced. When you take pain pills and they reduce pain, this is an example of a situation where the pills lessen the pain.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  decrease, diminish, lessen, fall(verb) decrease in size, extent, or range. The amount of homework decreased towards the end of the semester; The cabin pressure fell dramatically; her weight fell to under a hundred pounds; his voice fell to a whisper. decrease, lessen, minify(verb) make smaller. He decreased his staff. subside, lessen(verb) wear off or die down. The pain subsided.