ppi en · NOUN Meanings (abbreviation, alt-of, initialism, uncountable) Initialism of pixels per inch. alt of pixels per inch (abbreviation, alt-of, initialism, uncountable) Initialism of picks per inch alt of picks per inch Although Tina used a slightly heavier yarn for the stripes in Towel 3, she was still able to achieve 23 ppi. 2026, Tina Glassenbury, “Hawk Moth Dish Towels”, in Handwoven, volume XLVII, number 1, page 56: