- His (or Her) Highness
- His Holiness (title of the Pope)
- (on Brit pencils) double hard
Collins Concise English Dictionary © HarperCollins Publishers::
HH abbreviation for
H, h /eɪtʃ/USA pronunciation
n. [countable], pl. Hs or H's, hs or h's.
H, an abbreviation of:
h, an abbreviation of:
h. or H., an abbreviation of:
WordReference Random House Learner's Dictionary of American English © 2026- Linguisticsthe eighth letter of the English alphabet, a consonant.
H, an abbreviation of:
- hard.
- Biochemistry, Slang Terms[Slang.]heroin.
- high.
h, an abbreviation of:
- hard.
- hardness.
h. or H., an abbreviation of:
- hard.
- hardness.
- height.
- high.
- hour.
H.H.,
an abbreviation of:
WordReference Random House Unabridged Dictionary of American English © 2026- Her Highness;
His Highness. - ReligionHis Holiness.
H, h
(āch),USA pronunciation n., pl. H's or Hs, h's or hs.
H,
H1 ,[Symbol, Chem.]
H2 ,[Symbol, Chem.]
H3 ,[Symbol, Chem.]
h,
h, [Symbol, Physics.]
H.,
h.,
WordReference Random House Unabridged Dictionary of American English © 2026- the eighth letter of the English alphabet, a consonant.
- any spoken sound represented by the letter H or h, as in hot or behave.
- something having the shape of an
H. - a written or printed representation of the letter H or h.
- a device, as a printer's type, for reproducing the letter H or h.
H,
- hard.
- Grammarhead.
- Chemistry, Electricity[Elect.]henry.
- Biochemistry, Slang Terms[Slang.]heroin.
- high.
- the eighth in order or in a series.
- (sometimes l.c.) the medieval Roman numeral for 200. Cf. Roman numerals.
- [Chem.]hydrogen.
- [Biochem.]histidine.
- [Physics.]
- enthalpy.
- horizontal component of the earth's magnetic field.
- See magnetic intensity.
- Music and Dancethe letter used in German to indicate the tone B.
H1 ,[Symbol, Chem.]
- Chemistryprotium.
H2 ,[Symbol, Chem.]
- Chemistrydeuterium.
H3 ,[Symbol, Chem.]
- Chemistrytritium.
h,
- hard.
h, [Symbol, Physics.]
- See Planck's constant.
H.,
- Drugs(in prescriptions) an hour.
- Latin hōra
h.,
- harbor.
- hard.
- hardness.
- heavy sea.
- height.
- hence.
- high.
- Sport[Baseball.]hit;
hits. - horns.
- hour;
hours. - hundred.
- husband.
H.H.,
- His Highness;
Her Highness. - ReligionHis Holiness.
'HH' also found in these entries (note: many are not synonyms or translations):