—n.
1 a thing or part added to remedy deficiencies (dietary supplement).
2 a part added to a book etc. to provide further information.
3 a separate section, esp. a colour magazine, added to a newspaper or periodical.
4 Geom. the amount by which an angle is less than 180° (cf. COMPLEMENT).
—v.tr. provide a supplement for.
Derivatives:
supplemental adj. supplementally adv. supplementation n.
Etymology: ME f. L supplementum (as SUB-, plere fill)
Useful english dictionary. 2012.