1

tat

play
verb \ˈtat\

Definition of tat

tatted

;

tatting

  1. intransitive verb
  2. :  to work at tatting

  3. transitive verb
  4. :  to make by tatting

Origin and Etymology of tat

back-formation from tatting


First Known Use: 1858

Other Handicraft Terms


2

tat

play
noun \ˈtat\
variants: or

Tat

Definition of tat

  1. :  a small protein produced by a lentivirus (such as HIV) that greatly increases the rate of viral transcription and replication and enhances the susceptibility of T cells to infection; also :  the viral gene that codes for the tat protein

Origin and Etymology of tat

trans-activating transcriptional regulation


First Known Use: 1985

Other Biochemistry Terms


3

tat

play
noun \ˈtat\

Definition of tat

chiefly US slang

  1. :  a tattoo on a person's skin <He pulls up his shirt to show us his tats. — Dave Eggers>

tat

verb

Origin and Etymology of tat

by shortening


First Known Use: 1987


4

tat

verb

Definition of tat

tatted

;

tatting

chiefly US slang

  1. transitive verb
  2. 1 :  to mark or color the skin with tattoos :  tattoo <The benefit of getting tatted at a festival is that you have more than 200 artists from which to choose. — Kellie Hwang> —often used with up < … say you're not a gang member, yet hang out with gang members, get tatted up with gang symbols or nicknames … — Kimberly Edds>

  3. 2 :  to mark (something) with something like a tattoo <Cargo trains, all rusted and tatted with graffiti, occasionally pass on the neighboring track. — Kara Starzyk> —often used with up <My passport got tatted up pretty good this year. I hit a dozen countries on five continents, as well as eight states. — The Chicago Sun-Times>

1995

First Known Use of tat

1995


TAT

abbreviation

Definition of TAT

  1. thematic apperception test


Medical Dictionary

tat

play
noun , often capitalized \ˈtat\

Medical Definition of tat

  1. 1:  a small protein produced by a lentivirus (as HIV) within infected cells that greatly increases the rate of viral transcription and replication and that is also secreted extracellularly where it plays a role in increasing viral replication in newly infected cells and in enhancing the susceptibility of T cells to infection—called also tat protein

  2. 2:  the viral gene that codes for the tat protein


TAT

abbreviation

Medical Definition of TAT

  1. thematic apperception test


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