1. to weaken or reduce in force, intensity, effect, quantity, or value. 2. to make thin; make slender or fine.
3. Bacteriology, Immunology: to render less virulent, as a strain of pathogenic virus or bacterium.
to become thin or fine; lessen.
1. weakened; diminishing.
2. Botany: tapering gradually to a narrow extremity.
The soprano held out the high note for a few seconds before allowing it to attenuate and dissolve entirely into the silence of the cathedral.
pressed together or compacted, as soldiers in rows.
The three sisters were serried in the bed like sardines in a can.