thru

preposition

1. 1

   From one side of an opening to the other.

   “I went through the window.”

2. 2

   Entering, then later leaving.

   “I drove through the town at top speed without looking left or right.”

3. 3

   Surrounded by (while moving).

   “We slogged through the mud for hours before turning back and giving up.”

4. 4

   By means of.

   “This team believes in winning through intimidation.”

5. 5

   In consequence of; as a result of.

6. 6

   To (or up to) and including, with all intermediate values.

   “from 1945 through 1991;  the numbers 1 through 9;  your membership is active through March 15, 2013”