Refers to a military, expedition, or operational base. Also used in compounds like 宇宙基地 (space station).
The US military has a base in Okinawa.
南極観測基地から中継です。
We are broadcasting from the Antarctic research base.
Internet slang suffix derived from キチガイ (crazy person). Attaches to nouns to mean 'someone obsessed with X'. Often written in katakana as キチ. Humorous and informal; can be derogatory.
彼は本当にゲームキチだよね。
He's a total game freak, isn't he.
ネットでよく見る「○○キチ」ってどういう意味？
What does '○○キチ' that you often see online mean?
There is a plan to build a new military base on this island.
Many soldiers are stationed at this base.
That country has set up a research base in Antarctica.
基地 usually refers to a physical military or scientific facility (e.g. a base of operations), while 本拠地 can be used more broadly for any organization's main base, including sports teams.
sub base; minor base
frontline base; forward base; outpost