DAILY UPDATED VOCABULARY WITH PICTURES. LOW (1).

• low comparative lower, superlative lowest
• 1

  small amount/level/value

• a) small, or smaller than usual, in amount, level, or value [≠ high]
• low income/pay/wages
• families existing on very low incomes
• In May, the price of cocoa fell to its lowest level since 1975-76.
• Morale has been low since the latest round of job-cuts.
• In this sort of investment, the risks are fairly low.
• low temperatures
• the need for low-cost housing
• a low-security prison
• b) 

  low in something

  having less than the usual amount of a substance or chemical [≠ high]:
• food that is low in calories
• low-fat/low-salt etc
• low-alcohol beer
• c) 

  in the low 20s/50s etc

  if a number, temperature, or level is in the low 20s, 30s etc, it is between 21 and 23, 31 and 33 etc:
• Tonight, temperatures in most areas will be in the low 50s.

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.