1. In an official role
   "officially, he is in charge"; "officially responsible" 
2. With official authorization
   - formally

See also: official

Antonym: unofficially

• Yellow Delicious
• yellow dock
• yellow dwarf
• yellow dwarf of potato
• yellow fever
• yellow flag
• yellow foxglove
• yellow foxtail
• yellow giant hyssop
• yellow globe lily
• yellow goatfish
• yellow granadilla
• yellow green
• yellow gurnard
• yellow hawkweed
• yellow henbane
• yellow honeysuckle
• yellow horned poppy
• yellow hornet
• yellow iris
• yellow ironweed
• yellow jacaranda
• yellow jack
• yellow jacket
• yellow jasmine