Definition of "waterer"

waterer

noun
plural waterers
1. One who waters plants.
  Quotations
  She has dabbled in jobs as various as plant-waterer for a garden centre, trackwork rider for a racehorse trainer and librarian's assistant […]
  2007, Eleanor Crawforth, Stephen Procter, Michael Schmidt, New Poetries IV, page 86
2. One who waters down, or dilutes, something.
  Quotations
  Any Community funds intended for wine producers should benefit the producers and not the manufacturers of false labels, the forgers of transit papers, the mixers or waterers of wine or the resourceful characters who defy science and produce wine without using any grapes whatsoever.
  1980, Official Journal of the European Communities
3. A device used for watering.
4. A device from which livestock, poultry, or pets may drink.