To cause (someone) to be acquainted (with someone else).
To add (something) to a system, a mixture, or a container.
To bring (something) into practice.
To make (something or someone) known by formal announcement or recommendation.
To cause to be preceded; to preface; to introduce.
To have higher rank than (someone or something else).
To go before, go in front of.
Brief editorial preface (usually to an article or essay)