What is the meaning of aching?

noun

• A dull persistent (usually moderately intense) pain.
  • synonyms: ache

verb

• Feel physical pain.
  • usage: "Were you hurting after the accident"
  • synonyms: hurt, ache, suffer
• Have a desire for something or someone who is not present.
  • usage: "She ached for a cigarette"; "I am pining for my lover"
  • synonyms: ache, yearn, yen, pine, languish
• Be the source of pain.
  • synonyms: ache, smart, hurt

adjective

• Causing a dull and steady pain.
  • usage: "my aching head"; "her old achy joints"
  • synonyms: achy