TID may refer to:

• Thermionic Detector, a detector used in gas chromatography based on the principle of ionization and measuring a change in electron flux
• Total Ionizing Dose (related to ionizing radiation)
• Transient ischemic dilation, a type of coronary artery disease
• TID class tug, a British tugboat design of WWII
• TID (musician) - a musician from Tanzania
• ter in die, Latin for three times daily; usually refers to medication dosage
• Tag identification memory, in a Gen 2 RFID tag, this consists of memory about the tag itself, such as the tag ID
• Transportation improvement district
• Travelling Ionospheric Disturbance - A type of Ionospheric perturbation

Turkish Sign Language is the language used by the deaf community in Turkey. As with other sign languages, TID has a unique grammar that is different from the oral languages used in the region.

TID may refer to:

• Thermionic Detector, a detector used in gas chromatography based on the principle of ionization and measuring a change in electron flux
• Total Ionizing Dose (related to ionizing radiation)
• Transient ischemic dilation, a type of coronary artery disease
• TID class tug, a British tugboat design of WWII
• TID (musician) - a musician from Tanzania
• ter in die, Latin for three times daily; usually refers to medication dosage
• Tag identification memory, in a Gen 2 RFID tag, this consists of memory about the tag itself, such as the tag ID
• Transportation improvement district
• Travelling Ionospheric Disturbance - A type of Ionospheric perturbation

Turkish Sign Language is the language used by the deaf community in Turkey. As with other sign languages, TID has a unique grammar that is different from the oral languages used in the region.