noun

• The act or process of augmenting.
• An addition or extra, something that is added to something else.
• (heraldry) A particular mark of honour, granted by the sovereign in consideration of some noble action, or by favour; and either quartered with the family arms, or on an escutcheon or canton.
• (medicine) A surgical procedure to enlarge a body part, as breast augmentation.
• (medicine) The stage of a disease during which symptoms increase or continue.
• (music) A compositional technique where the composer lengthens the melody by lengthening its note values.
• (Scotland, law) An increase of stipend obtained by a parish minister by an action raised in the Court of Teinds against the titular and heritors.