1. (

• aridity ,
• aridness ,
• thirstiness ,

) a deficiency of moisture (especially when resulting from a permanent absence of rainfall) ;

2. (

• thirst ,
• thirstiness

) a physiological need to drink ;

3. (

• hunger ,
• hungriness ,
• thirst ,
• thirstiness

) strong desire for something (not food or drink); "a thirst for knowledge"; "hunger for affection" ;