PM Rajiv Gandhi was assassinated in May 1991 by the Sri Lankan Tamil linked to LTTE. What does E stands in 'LTTE'?

Eelam

The demise of Rajiv Gandhi in May 1991 brought about a shift in the leadership of the Congress party. His assassination occurred during an election campaign tour in Tamil Nadu and was attributed to a Sri Lankan Tamil associated with the LTTE.
LTTE stands for "Liberation Tiger for Tamil Eelam".