A unit of stock containing fewer shares than the usual one hundred or ten shares that make up units for sale. of counsel.ADJ. Describes an attorney who assists in the preparation of a case but is not the lead attorney on it, or an attorney who is semi-retired from a firm or works at it part-time. of course.ADV. Used to describe an action that is a person's right, which does not need justification or permission, usually in the phrase \