1

tat

verb \ ˈtat \

Definition of tat

tatted; tatting
intransitive verb
: to work at tatting
transitive verb
: to make by tatting

Origin and Etymology of tat

back-formation from tatting

Other Handicraft Terms


2

tat

noun \ ˈtat \
variants: or Tat

Definition of tat

: 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

Other Biochemistry Terms


3

tat

noun \ ˈtat \

Definition of tat

chiefly US slang
: 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


4

tat

verb

Definition of tat

tatted; tatting
transitive verb
chiefly US slang
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
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

First Known Use of tat

1995


TAT

abbreviation

Definition of TAT

thematic apperception test

Medical Dictionary

tat

noun, often capitalized \ ˈtat \

medical Definition of tat

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 : the viral gene that codes for the tat protein

TAT

abbreviation

medical Definition of TAT

thematic apperception test

Learn More about tat


Seen and Heard

What made you want to look up tat? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to provide what is needed to exist

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman-tablet
  • What did focus mean in Latin?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!