alter Play verbChange or cause to change in character or composition, typically in a comparatively small but significant way. SYNONYMS adaptadjustamendchangeconvertevolveimprovemake adjustments tomake alterations tomake changes tomake differentmodifyrecastreconstructredesignredorefashionrefinereformremakeremodelremouldreorderreorganizereorientreorientatereshaperestylerevamprevisereworktransfiguretransformtransmutevary