A prefix to words, meaning “with” or “in conjunction or “Joint;” e. p., cotrustees, co-executors. Also an abbreviation for “county,” (Oilman v. Sheets, 78 Iowa, 499, 43 N. W. 299,) and for “company,” (Railroad Co. Y. People, 155 I1L 299, 40 N. E. 599.)