What does "simple present" mean?

The present tense; a verb or sentence in this tense.

What is a synonym for "simple present"?

Common synonyms include: present simple, present tense, present tenses.

noun

noun ·Rare ·Advanced level

Noun

1
The present tense; a verb or sentence in this tense. uncountable, usually
2
the tense that is used to refer to events, actions, and conditions that are happening all the time, or exist now. wordnet

From simple (“accompanied by no modal or auxiliary verb”) + present (“current time”).