IPA: /ˈmiːnɪŋfəli/
KK: /ˈmiːnɪŋli/
In a way that suggests a deeper or implied significance.
She looked at him meaningfully, hinting at her true feelings.
Meaningfully is formed from "meaning" (from Old English "mænan", meaning to signify or intend) and the suffix "-ly" (meaning in a manner of). The word "meaningfully" describes doing something in a way that conveys significance or intention.
Think of 'meaning' as signifying something important, and '-ly' indicates the manner in which it is done. So, when something is done meaningfully, it is done in a way that shows significance.