Q: Does the word "hold" mean the same thing in "The general ordered the colonel to hold his position at all costs." and "Hold the taxi."?

A: the same meaning

Q: Does the word "day" mean the same thing in "My day began early this morning." and "It was a busy day on the stock exchange."?

A: the same meaning

Q: Does the word "mouth" mean the same thing in "She wiped lipstick from her mouth." and "The jar had a wide mouth."?

A: different meanings

Q: Does the word "platoon" mean the same thing in "The defensive platoon of the football team." and "Platoons of tourists poured out of the busses."?

A:
the same meaning