The meaning of "thanksgiving"

On thanksgiving morning i cried uncontrollably because i thought it was a good idea to look through some pictures from years back. but little did i know, those pictures made me cry so much because it reminded me of my mom and how much i missed her. the day before thanksgiving my dad asked me what i was thanking God for and i told him that i was thankful for my dad living, our family not falling apart, how God gave us the strength to persevere through this, and just everything that happened. i guess you could say that i had a "good" thanksgiving because i got so much out of it but it was a lonely thanksgiving as well...