an alphabetic system for writing Old Irish, developed in the 5th and 6th cent. , in which the letters are represented by various combinations of lines or notches as carved along the edge of a memorial stone
a. An alphabetic system of inscribed notches for vowels and lines for consonants used to write Old Irish, chiefly on the edges of memorial stones, from the fifth to the early seventh century.
b. A character used in this alphabet.
a. An inscription in the ogham alphabet.
b. A stone inscribed in the ogham alphabet.
Origin:
Origin: Irish Gaelic
Origin: , from Old Irish ogom
Origin: , after Ogma, name of a Celtic god; see ag- in Indo-European roots