What is the meaning of sweat?

noun

• Salty fluid secreted by sweat glands.
  • usage: "sweat poured off his brow"
  • synonyms: perspiration, sudor
• Agitation resulting from active worry.
  • usage: "don't get in a stew"; "he's in a sweat about exams"
  • synonyms: fret, stew, lather, swither
• Condensation of moisture on a cold surface.
  • usage: "the cold glasses were streaked with sweat"
• Use of physical or mental energy; hard work.
  • usage: "he got an A for effort"; "they managed only with great exertion"
  • synonyms: effort, elbow grease, exertion, travail

verb

• Excrete perspiration through the pores in the skin.
  • usage: "Exercise makes one sweat"
  • synonyms: sudate, perspire