Acting to supplement. / Appending. / Lacking a regular schedule (as in a supplemental airline).

Something that supplements or adds to. / A requisition or article of legislation that provides additional funding for a program.

plural of supplemental

In a supplemental manner.

Something added, especially to make up for a deficiency. / An extension to a document or publication that adds information, corrects errors or brings up to date.

To provide or make a supplement to something.

The act of supplementing / Something added as a supplement

simple past tense and past participle of supplement

plural of supplement

Third-person singular simple present indicative form of supplement