supplement ( supplements plural & 3rd person present) ( supplementing present participle) ( supplemented past tense & past participle )
1 verb If you supplement something, you add something to it in order to improve it.
...people doing extra jobs outside their regular jobs to supplement their incomes... V n
I suggest supplementing your diet with vitamins E and A. V n with n
Supplement is also a noun., n-count oft N to n
Business sponsorship must be a supplement to, not a substitute for, public funding.
2 n-count A supplement is a pill that you take or a special kind of food that you eat in order to improve your health.
...a multiple vitamin and mineral supplement...
3 n-count A supplement is a separate part of a magazine or newspaper, often dealing with a particular topic.
...a special supplement to a monthly financial magazine.
4 n-count A supplementto a book is an additional section, written some time after the main text and published either at the end of the book or separately.
oft N to n
...the supplement to the Encyclopedia Britannica.
5 n-count A supplement is an extra amount of money that you pay in order to obtain special facilities or services, for example when you are travelling or staying at a hotel.
If you are travelling alone, the single room supplement is £11 a night.
6 n-count A supplement is an extra amount of money that is paid to someone, in addition to their normal pension or income. usu N n, N to n Some people may be entitled to a housing benefit supplement., ...people who need a supplement to their basic pension.
colour supplement ( colour supplements plural ) A colour supplement is a colour magazine which is one of the sections of a newspaper, especially at weekends.
in AM, use supplement
single supplement ( single supplements plural ) , single person supplement A single supplement is an additional sum of money that a hotel charges for one person to stay in a room meant for two people. n-count
You can avoid the single supplement by agreeing to share a twin room.