Ted Pettit, The World's Laziest Excel Power User. Views. x>=y means x is greater than or equal to y. You have to write it that way, x=>y is not allowed. Likewise, x<=y means x is lesser than or equal to y. And, you have to write it that way, x=<y is not allowed.
Freebase(0.00 / 0 votes)Rate this definition: Tic-tac. Tic-tac is a traditional method of signs used by bookmakers to communicate the odds of certain horses. Until the turn of the 21st Century it was a very common sight on racecourses in the UK, but with the advent of mobile technology it is now seldom seen.
1 Tat, verb for the action of making lace. 2  Tat, short for tattoo. 3  Tat, a British colloquial term for cheap and tasteless trinkets or for personal possessions, particularly when at a music festival.  Tatting, a British colloquial term for searching for abandoned, useful tat (personal possessions)