"full of meaning, significant," 1827, from meaning (n.) + -ful. Related: Meaningfully; meaningfulness.
"inconstant, fickle," c. 1600, from change (n.) + -ful. Related: Changefulness.
"praying much, devout," 1620s, from prayer + -ful. Related: Prayerfully; prayerfulness.
"as much as will fill a pocket," 1610s, from pocket (n.) + -ful.
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