Adapter may refer to:

• Adapter (device), used to match the physical or electrical characteristics of two different objects
• Adapter (genetics), a small DNA molecule used in genetic engineering
• Adapter (rocketry), a segment between rocket stages
• Adapter (computing), used to connect various hardware devices
• Adapter (piping), a short length of pipe with two different ends, see coupling (piping)
• Adapter pattern, a software design pattern used for computer programming
• Adaptor protein, a type of protein involved in cell signalling

ca:Adaptador it:Adattatore (disambigua) ru: sk:Adapt r