Grandfather

n.

1.

A father's or mother's father; an ancestor immediately after the father or mother in lineal ascent. Grandfather longlegs (Zool.) See Daddy longlegs.

Noun

1.

grandfather - the father of your father or mother Synonyms: gramps, grandad, granddad, granddaddy, grandpa

GRANDFATHER, domestic relations. The father of one's father or mother. The father's father is called the paternal grandfather; the mother's father is the maternal grandfather.

Father Time, Methuselah, Nestor, Old Paar, centenarian, dotard, elder, gaffer, geezer, golden-ager, grampa, gramps, grandpa, grandsire, graybeard, great-grandfather, nonagenarian, octogenarian, old chap, old codger, old dog, old duffer, old geezer, old gent, old gentleman, old man, old party, old-timer, older, oldster, pantaloon, patriarch, presbyter, senior citizen, septuagenarian, sexagenarian, the quiet-voiced elders, venerable sir, veteran