From meaning + -ful.

• (British) IPA: /ˈmiː.nɪŋ.fʊl/, [ˈmiː.nɪŋ.fl̩]
• (America, Canada) IPA: /ˈmi.nɪŋ.fəl/, [ˈmi.nɪŋ.fl̩]
• (Australia) IPA: /ˈmiː.nɪŋ.fʊl/, [ˈmɪi.nɪŋ.fl̩]

meaningful

1. Having meaning, significant.

   I think we made a meaningful contribution to this project today.

   • 1948, Ray Bradbury, Tomorrow's Child:

     "This baby is the one that counts. I dare say Polly here wouldn't want any other, would you, Polly?"
     "This baby, this baby," said Polly.
     Wolcott gave Peter Horn a meaningful look. Horn interpreted it correctly. This baby or no more Polly ever again. This baby or Polly would be in a quiet room somewhere staring into space for the rest of her life.

• meaningless

• French: significatif, qui a du sens
• German: bedeutend, bedeutungsvoll, sinnhaft
• Italian: significativo, sensato, efficace, costruttivo
• Portuguese: significativo
• Russian: зна́чимый
• Spanish: significativo