Definition of -ful suffix from the Oxford Advanced Learner's Dictionary

  1. 1(in adjectives) full of; having the qualities of; tending to sorrowful masterful forgetful
  2. 2(in nouns) an amount that fills something handful spoonful More Like This Suffixes -able, -age, -al, -ance, -ant, -arian, -ary, -dom, -ee, -er, -ese, -esque, -ess, -fold, -ful, -hood, -ify, -ion, -ish, -ism, -ist, -ista, -ite, -itis, -ize, -less, -let, -ling, -ly, -ment, -most, -ness, -oid, -or, -ous, -shipSee worksheet.
  3. Word Originfrom full.
See the Oxford Advanced American Dictionary entry: -ful