1. Concerning how someone is prepared for an occasion or a purpose in an appropriate or satisfactory manner: Mrs. Marshall was suitably and properly dressed for her daughter's marriage ceremony.

Jane went out to work in the garden in her high-heeled shoes, but she certainly wasn't suitably clothed for pulling weeds!
2. Pertaining to how a person or something is fitting or apt; fittingly; aptly: Mary decided to make a dramatic entrance to the party to make sure that everyone was suitably impressed.