On or at the top
- on, to, or towards the top
- On or towards the top.
1650s, from a- (1) + top. Two terms or hyphenated in the beginning; perhaps not fully founded as one word till belated 19c.
(adv.) On or at the very top.
He snatched her hands and pinned them above her head with one hand, settling his weight atop her as he reached down to undo the buttons of his trousers.