Definition of "RH"

RH

noun
countable and uncountable, plural RHs
1. Initialism of relative humidity.
2. (music, knitting) Initialism of right hand.
  Quotations
  Work wraps together with wrapped sts as you come to them, as follows: Insert RH ndl into wrap at base of wrapped st from beneath, then bring RH ndl up and into st on LH ndl, ready to work the st […]
  2012, Stefanie Japel, Mom and Me Knits, page 13
3. Initialism of review hearing.
4. (US, army, aviation) Initialism of reconnaissance helicopter.