adviser
/ədˈvʌɪzə
/(also advisor) Usage
noun
A person who gives advice in a particular field: the military adviser to the President...
- In the past he has been an adviser to the New Zealand and Russian Governments on pensions policy.
- An adviser to the Royal Mail has been involved in discussions with major banks.
- Strangely, he is the adviser to the transport department whose services the police use.
Synonyms
counsellor, mentor, guide, consultant, consultee, confidant, confidante, guide, right hand man, right hand woman, aide, helper;
instructor, coach, trainer, teacher, tutor, guru;
Italian consigliere
informal main man
North American informal Dutch uncle
Usage
The spellings adviser and advisor are both correct. Adviser is more common, but advisor is also widely used, especially in North America. Adviser may be seen as less formal, while advisor often suggests an official position.