Ecclesiastical The third of the seven canonical hours. No longer in liturgical use. Ecclesiastical The time of day appointed for this service, usually the third hour after sunrise. A measure of liquid capacity, equal to a third of a pipe, or 42 gallons (159 liters). Games A sequence of three cards of the same suit. Sports The third position from which a parry or thrust can be made in fencing. Music An interval of a third.