What is the meaning of labouring?

verb

• Work hard.
  • usage: "She was digging away at her math homework"; "Lexicographers drudge all day long"
  • synonyms: labor, labour, toil, fag, travail, grind, drudge, dig, moil
• Strive and make an effort to reach a goal.
  • usage: "She tugged for years to make a decent living"; "We have to push a little to make the deadline"; "She is driving away at her doctoral thesis"
  • synonyms: tug, labor, labour, push, drive
• Undergo the efforts of childbirth.
  • synonyms: labor, labour

adjective

• Doing arduous or unpleasant work.
  • usage: "drudging peasants"; "the bent backs of laboring slaves picking cotton"; "toiling coal miners in the black deeps"
  • synonyms: drudging, laboring, toiling