What is the meaning of Ch?

A digraph from c and h, considered an individual letter in some languages.

Alternative form of cosh (hyperbolic cosine)

ISO 639-1 language code for Chamorro.

Abbreviation of chain, a unit of measurement equal to 22 yards

Abbreviation of chapter, main section of a book

Abbreviation of chestnut, a dark reddish-brown colored horse

Abbreviation of channel, in reference to telephones, audio, radio, and television

Alternative form of I

A letter of the Bilen Latin alphabet.

A letter of the Chipewyan alphabet, written in the Latin script.

A letter of the practical Hadza alphabet.

A letter of the Mam alphabet.

A letter of the Osage Latin alphabet. Osage script 𐓴.

a digraph, the fourteenth letter of the Czech alphabet, after h and before i

A digraph used in the h-sistemo to represent ĉ.

ea (each)

hp (horsepower)

A digraph used in several Hungarian words, as well as in some surnames, given names, and geographical names.

A digraph in Irish orthography

a letter used in older, pre-World-War-II Latvian spelling, but now replaced everywhere by h (upper case H)

The twelfth letter of the Lower Sorbian alphabet, called cha and written in the Latin script.

The sixteenth letter of the Slovak alphabet, written in the Latin script.

che, the former fourth letter of the Spanish alphabet, after c and before d

The fourth letter of the Tagalog alphabet (the Abecedario), called che and written in the Latin script.

The twenty-eighth letter of the Uzbek alphabet, written in the Latin script.

The fourth letter of the Welsh alphabet, called èch and written in the Latin script. It is preceded by C and followed by D.

A digraph in Xhosa orthography.

Source: wiktionary.org